Translate this page into:
The Psychosocial and Spiritual Experiences of Patients with Advanced Incurable Illness in Bangladesh: A Cross-Sectional Observational Study
Address for correspondence: Dr. Megan E Doherty, 401 Smyth Road, Ottawa, Canada. E-mail: megan.elizabeth.doherty@gmail.com
This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
This article was originally published by Wolters Kluwer - Medknow and was migrated to Scientific Scholar after the change of Publisher.
Abstract
Context:
The psychosocial and spiritual needs of individuals with life-limiting conditions in low- or middle-income countries have not been well described. Understanding these needs is important to providing holistic palliative care.
Aim:
This study aims to better understand the psychosocial and spiritual needs and supports of patients with advanced, incurable illness in Bangladesh.
Subjects and Methods:
Individuals with advanced incurable illnesses (advanced cancer and HIV/AIDS) from a wide geographical distribution across Bangladesh were interviewed about their health status, emotional and spiritual experiences with their illness, coping and support systems, and greatest needs and fears.
Results:
We interviewed 221 individuals with incurable cancer (82%) or HIV/AIDS (18%). Self-reported health status was poor or very poor for 48%, and 44% reported feeling unhappy all of the time. The majority (61%) rated their current level of unhappiness as 10/10. Spouses (50%), children (15%), and parents (13%) were the most common caregivers. Money and medical care were equally the most common needs (46%). Participants’ greatest fears were for the future of their children (38%), being in pain (29%), and dying (28%).
Conclusions:
There is a significant burden of psychosocial and spiritual concerns among patients with advanced incurable illness in Bangladesh, with sadness being very frequent and of high intensity. Family and friends provide significant emotional and practical support to patients who are seriously ill, but very few patients access any professional support for these concerns.
Keywords
Advanced cancer
communication
developing countries
HIV/AIDS
palliative care
psychosocial issues
spiritual issues
INTRODUCTION
Palliative care is a holistic approach to care that aims to improve the quality of life of patients with life-limiting illness, by addressing the physical as well as psychological, emotional, and spiritual needs of patients and families. Spiritual and emotional concerns may become particularly important to patients with terminal conditions, and several studies have described how patients in this situation search for a deeper meaning in life or turn to spiritual reflection.[12] In addition, emotional symptoms such as depression, anxiety, and hopelessness may be frequent among patients with incurable illnesses.[3] Several studies in palliative care have found that addressing patients’ emotional and spiritual needs can improve their psychological functioning and quality of life.[24]
Despite widespread global recognition of the importance of palliative care to reduce unnecessary suffering in resource-limited settings, palliative care is still largely inaccessible to many individuals living in low- or middleincome countries (LMIC), where an estimated 78% of adults in need of palliative care reside.[56] Moreover, the majority of research on palliative care is conducted in high-income countries.[7] A recent review of spirituality within health literature found that only 2.8% of articles originated in non-Western countries.[8]
Given the individualized nature of psychosocial and spiritual care, assessment and treatment tools designed based on high-income populations may not be applicable to those in LMICs. Differences in the psychosocial and spiritual needs of patients with advanced illness in non-Western countries may be due to differences in medical decision-making, pressure for collusion, extreme poverty, and cultural expectations about emotional and spiritual responses to severe illness.[91011] In some cultures, the patient's relatives may be expected to direct healthcare-related decisions.[9] In addition, differences in levels of education, occupation, values, and religious beliefs among low-income populations have been observed to influence patients’ greatest fears and concerns at the end of life.[12] It is clear that an improved understanding of the cultural, social, and emotional experiences of terminally ill individuals in non-Western countries is critical for improving psychosocial and spiritual aspects of palliative care in these settings.
The primary aim of this study was to better understand the psychological, spiritual, and social needs and experiences of patients with advanced, incurable illness in Bangladesh. Secondary aims were to study support systems and coping strategies which patients employed to manage their emotional and spiritual needs.
We hope that these findings will raise awareness about the emotional and spiritual needs of patients who require palliative care in LMICs and support efforts to develop and implement services to address these needs. Expanding our understanding of the needs of terminally ill patients in a variety of cultures is an important step toward accomplishing the World Health Organization's vision of improved palliative care services in all the countries in need.[6]
SUBJECTS AND METHODS
Recruitment and sampling
We recruited individuals through convenience sampling from the oncology departments of the government referral hospital located in the main city of each of the 7 administrative divisions in Bangladesh and in one smaller city in a divisional subdistrict in each district. We also recruited participants from local HIV/AIDS support organizations in each division. Potential participants were invited to participate by trained interviewers if they had a confirmed diagnosis of advanced, incurable cancer or HIV/AIDS and if the patient was aware of his or her diagnosis. All interviews were conducted between May and June 2014.
Design and content of the interviews
Interview schedules were developed by reviewing relevant literature including the protocol for rapid situational analysis of palliative care in Vietnam.[13] The interview schedule was then culturally adapted and translated into the Bengali language. A pilot interview schedule was developed which was reviewed by local palliative care practitioners and subsequently tested with ten patients. The modifications from this feedback were to improve the clarity of the questions and response items to reflect cultural and linguistic specificities. This study describes a psychosocial and spiritual interview which was part of the larger national situational analysis of palliative care. Other portions of the national situational analysis have been described elsewhere.[14] All participants provided written informed consent before participating in the study.
The demographic information collected included age, gender, marital status, religion, and occupation. Findings related to medical treatments and physical symptoms have been previously reported.[14] Participants were asked about their emotions and their severity, their support systems and coping mechanisms, their greatest needs, their experience after learning of their diagnosis, and the supports they received from family and friends.
Interview process
Interview was conducted by trained interviewers and was typically 20–45 min in duration. For patients who were <18 years of age, informed consent was obtained from a parent, and the patient provided verbal assent. Individuals informed that they were permitted to skip any questions that they did not want to answer.
Ethical approval
The study was approved by the Directorate General of Health Services (DGHS) of Bangladesh and all the institutions and programs involved in the study. Ethical approval was granted by the Institutional Review Board of Bangabandhu Sheikh Mujib Medical University and the Research Review Board of the DGHS, Ministry of Health and Family Welfare.
Statistical analysis
Data are expressed as either mean, range, standard deviation (SD), or percentage of the total number of patients who provided a response for each item. Data analysis was performed using Microsoft Excel (Microsoft).
RESULTS
Participant characteristics
There were 181 individuals with advanced incurable cancer (81.9%) and 40 with HIV/AIDS (18.1%). The average age of study participants was 45.5 years (SD = 16.4, range: 7–95 years). Self-reported health status was described as poor or very poor by 48.4% (n = 107) of individuals. The majority (97.7%, n = 216) of individuals were receiving treatment for their disease at the time of the study. Further sociodemographic characteristics of the participants are shown in Table 1.
Demographic details | n (%) |
---|---|
Age (years) | |
Mean | 45.5 |
Range (SD) | 7-95 (16.4) |
Gender | |
Male | 119 (59.5) |
Female | 102 (51.0) |
Social characteristics | n (%) |
Marital status | |
Married | 178 (80.5) |
Single | 19 (8.6) |
Widowed | 19 (8.6) |
Separated/divorced | 5 (2.3) |
Highest level of education attained | |
Primary school | 115 (52.0) |
Secondary school | 14 (6.3) |
College, university, or higher | 7 (3.2) |
No formal education | 85 (38.5) |
Occupation | |
Homemaker | 66 (29.9) |
Unemployed | 48 (21.7) |
Public or private sector worker | 40 (18.1) |
Farmer | 30 (13.6) |
Small business owner/self-employed | 19 (8.6) |
Student | 9 (4.1) |
Other | 9 (4.1) |
Health status and current treatments | n (%) |
Self-reported health status | |
Very poor | 48 (21.7) |
Poor | 59 (26.7) |
Neither poor nor good | 79 (35.7) |
Good | 31 (14.0) |
Very good | 4 (1.8) |
Currently receiving treatment for disease | |
Yes | 216 (97.7) |
No | 5 (2.3) |
Emotional experiences of receiving diagnosis and living with illness
When participants were asked to rate their peak unhappiness following diagnosis on a scale of 0 (no unhappiness) to 10 (maximum unhappiness), the majority (61.2%, n = 112) rated their unhappiness as maximum (10/10). Almost half of all participants reported feeling unhappy all of the time (43.9%, n = 97). When asked to categorize their overall satisfaction with life, just over half of participants (51.4%, n = 112) reported feeling somewhat satisfied and 19.3% (n = 42) were not satisfied with life. The vast majority of participants (80.5%, n = 178) denied ever facing discrimination because of their illness. There were forty-three individuals who reported discrimination (19.5%), most commonly by family members (67.4%, n = 29) and neighbors (41.9%, n = 18). Further details of participants’ emotional experiences of illness are displayed in Table 2.
n (%) | |
---|---|
Have you experienced discrimination due to your illness (n=221) | |
Yesa | 43 (19.5) |
By family | 29 (67.4) |
By neighbors | 18 (41.9) |
By friends | 3 (7.0) |
By healthcare workers | 2 (4.7) |
Unspecified | 1 (2.3) |
No | 178 (80.5) |
How often do you feel unhappy (n=221) | |
All of the time | 97 (43.9) |
Almost everyday | 25 (11.3) |
At least once a week | 34 (15.4) |
At least once a month | 10 (4.5) |
Not often | 10 (4.5) |
Never | 33 (14.9) |
Unsure | 5 (2.3) |
Missing data | 7 (3.2) |
Peak intensity of unhappiness on scale of 0-10 since learning diagnosis (n=183) | |
No unhappiness (0/10) | 14 (7.7) |
Mild (1-3/10) | 8 (4.4) |
Moderate (4-6/10) | 24 (13.1) |
Severe (7-9/10) | 25 (13.7) |
Maximal unhappiness (10/10) | 112 (61.2) |
How satisfied do you feel with your life (n=218) | |
Very satisfied | 12 (5.5) |
Satisfied | 52 (23.9) |
Somewhat satisfied | 112 (51.4) |
Not at all satisfied | 42 (19.3) |
Support systems and coping activities
Spouses were the most common main caregivers (49.8%, n = 110), followed by children (14.9%, n = 33) and parents (12.7%, n = 28). When asked about sources of psychological or spiritual support, 151 participants (70.6%) were able to identify someone as a source of psychological or spiritual support. Common supports were other family members (n = 40.4%, n = 61), spouses (24.5%, n = 37), or siblings (21.2%, n = 32). Talking to family (40.2%, n = 78) was the most common activity which participants reported using to cope with unhappiness. Further details of the support systems described by participants are shown in Table 3.
n (%) | |
---|---|
Who is your main caregiver? (n=213) | |
Spouse | 110 (49.8) |
Child | 33 (14.9) |
Parent | 28 (12.7) |
Cares for themselves, or does not have a caregiver | 19 (8.6) |
Sibling | 11 (5.0) |
Other family member | 10 (4.5) |
Friend | 2 (0.9) |
Other (unspecified) | 8 (3.6) |
Source of psychological and/or spiritual support (n=214) | |
Do you have someone to provide support if neededa | 151 (70.6) |
Other family member | 61 (40.4) |
Spouse | 37 (24.5) |
Sibling | 32 (21.2) |
Parent | 27 (17.9) |
Close friend | 23 (15.2) |
Healthcare worker | 15 (9.9) |
Another person with the same disease | 15 (9.9) |
Neighbor | 11 (7.3) |
Nongovernmental organization worker | 3 (2.0) |
Spiritual leader (imam, priest, etc.) | 2 (1.3) |
Counselor | 1 (0.7) |
Does not have a person to provide support, if needed | 63 (29.4) |
Have you received support from (n=131)a | |
Family | 93 (71.0) |
Neighbors | 30 (22.9) |
People’s committee | 21 (16.0) |
Friends | 19 (14.5) |
Hospital outpatient department | 19 (14.5) |
Social welfare officer | 3 (2.3) |
Local religious group | 2 (1.5) |
Nongovernmental organization worker | 2 (1.5) |
Home-based care team | 2 (1.5) |
Other (unspecified) | 6 (4.6) |
Activities used to cope with unhappiness (n=194)a | |
Talk to family | 78 (40.2) |
Go to a religious place | 57 (29.4) |
Talk to friends | 45 (23.2) |
Wander about with no aim in mind | 27 (13.9) |
Take medications | 26 (13.4) |
Listen to music, watch TV, or read | 12 (6.2) |
Meditate or sit silently | 11 (5.7) |
Sleep or rest | 9 (4.6) |
Exercise or walk | 6 (3.1) |
Greatest needs and fears
When asked to describe their greatest needs, money and medical care were the most common responses, which were reported with equal frequency (46.0%, n = 99). A need for pain relief (21.4%, n = 46) or food (11.2%, n = 24) were also common responses. Participants’ greatest fears were commonly about the future of their children (38.3%, n = 82), followed by being in pain (29.0%, n = 62) and dying (28.0%, n = 60). Participants most commonly desired information about how to care for themselves (42.2%, n = 89) and their disease and its treatment (26.5%, n = 56). Further details about participants’ needs are shown in Table 4.
n (%) | |
---|---|
Greatest needs (n=215)a | |
Money | 99 (46.0) |
Medical care | 99 (46.0) |
Pain relief | 46 (21.4) |
Food | 24 (11.2) |
ART | 20 (9.3) |
Someone to take care of me at home | 20 (9.3) |
A job or source of income | 19 (8.8) |
Respect | 16 (7.4) |
Knowledge about taking care of myself | 13 (6.0) |
Treatment for disease | 11 (5.1) |
Love | 9 (4.2) |
Unspecified | 8 (3.7) |
Nothing | 7 (3.3) |
Greatest fears (n=214)a | |
Children’s future | 82 (38.3) |
Being in pain | 62 (29.0) |
Dying | 60 (28.0) |
Disease or treatments | 22 (10.3) |
Not being loved | 9 (4.2) |
Not receiving a proper funeral | 8 (3.7) |
Feeling hopeless | 7 (3.3) |
Having symptoms other than pain | 4 (1.9) |
Future of other family members | 3 (1.4) |
Other | 14 (6.5) |
Nothing | 17 (7.9) |
Service needs (n=208)a | |
Pain relief | 85 (40.9) |
Relief from symptoms other than pain | 63 (30.3) |
Treatment for medical condition | 50 (24.0) |
Care for my children or grandchildren | 33 (15.9) |
Treatment for HIV | 32 (15.4) |
Help finding a source of income or financial support | 25 (12.0) |
Home-based care | 22 (10.6) |
Help sending children to school | 20 (9.6) |
Counseling or emotional support | 15 (7.2) |
Spiritual advice | 5 (2.4) |
Legal advice | 3 (1.4) |
HIV/AIDS support group | 3 (1.4) |
Otherb | 9 (4.3) |
Informational needs (n=211)a | |
Information about how to take care of self | 89 (42.2) |
Information about disease or disease-specific treatments | 56 (26.5) |
Information about nutrition | 45 (21.3) |
Information about finding a job or source of income | 34 (16.1) |
Information about how to access treatment for the disease | 15 (7.1) |
Information related to helping family members | 4 (1.9) |
Information about how the government helps people with this disease | 3 (1.4) |
Information about symptom management | 3 (1.4) |
Spiritual or religious advice | 2 (0.9) |
Otherc | 13 (6.2) |
Nothing | 10 (5.5) |
DISCUSSION
We describe the psychosocial and emotional experiences of individuals living with advanced incurable illnesses across a wide geographical distribution in Bangladesh. We found that family and friends were a frequent source of support for ill individuals, providing both emotional and practical caregiving support; however, a significant proportion of individuals reported having no one to provide them with psychological or spiritual support, and feelings of sadness were very common among patients. Patients frequently reported fears about the future of their children, dying, or being in pain. Money and medical care were the most common needs of patients.
Emotional needs and support
We found that the majority of patients reported that they depended on family or friends for psychological or spiritual support. In Bangladesh and many other LMICs, access to psychosocial health professionals is often very limited, with a recent World Health Organization study estimating that at least 239,000 mental health workers are needed to address the current shortage of health professionals in the 58 LMICs which were sampled.[15] We found only a small number of patients were receiving support from a healthcare professional with only one patient specifically mentioning a counselor, which suggests that there is limited availability of psychosocial professionals to address the emotional and spiritual suffering of patients in Bangladesh. In the absence of professional mental health services, patients may seek the support of family and friends. Although many patients do derive support from family and friends, we also found that a significant number of individuals (29%) did not have anyone to provide them with these supports, further demonstrating the extent of this need.
We found that patients had very significant feelings of sadness, with 122 patients (58.4%) reporting that they felt sad almost every day or all of the time. These findings are similar to those from India where patients reported emotions such as fear and feeling useless or a burden, which caused unhappiness.[12] Our findings suggest a need for improved psychosocial and spiritual care for patients with serious illnesses and support the findings of a recent global mapping exercise of the significant gap in the availability of palliative care in Bangladesh.[16] Further studies are needed to better understand the psychosocial support services which will support patients and how to deliver these supports in a resource-limited setting.
Practical caregiving support
We found that family members were the main caregivers for patients, with only one patient reporting a healthcare worker as their main caregiver. In many non-Western societies, family members are expected to provide care during times of illness, and there may be few options for nonfamily caregiving.[17] In Bangladesh, a shortage of nurses may limit patients’ access to formal caregiving from the healthcare system.[18] In addition, the financial burden of paying for caregiving services, most of which are not publicly funded, means that most patients would struggle to afford these services in a resource-limited setting. Our findings are similar to those of a study from Kerala, India, which reported that most terminally ill patients were cared for by their family.[12] This study from Kerala also found that the caregiving support provided by family members was a source of concern for patients since it make them feel or fear being a burden to their family.[12] Our study did not directly examine this aspect of family caregiving, and further studies are needed to better understand the caregiving experiences, patients in non-Western societies, and the impacts of family caregiving on both the patient and their family members.
Greatest fears
We found that the most common fears identified by patients were related to the future of their children, dying, or being in pain. Concerns about the future welfare of family members have also been identified in previous studies exploring the fears of patients needing palliative care in other South Asian settings.[1219] Previous studies from a wide range of cultures and resource levels have reported that fears about dying and having poorly controlled symptoms are common among palliative care patients.[121920] A previous report about the physical symptom needs of patients in Bangladesh found that severe pain was frequent, with similar findings reported in other studies of palliative care patients in South Asia.[1421] Although we did not examine healthcare providers’ knowledge and skills in pain management, it may be that limited training in pain management among physicians and other healthcare professionals contributes to fears about pain among patients. Several previous studies of physicians’ pain management knowledge and skill in Bangladesh found that most physicians were unaware of the role of opioids in cancer pain management, and the majority did not feel comfortable prescribing oral morphine for this indication.[2223] Palliative care and pain management has yet to be incorporated into undergraduate-level training programs for healthcare professionals in Bangladesh.[14] Patients may also be aware that that will be unable to access pain medications in the advanced stages of their illness.[24] Our findings provide further evidence of the need for palliative care services and access to oral morphine across Bangladesh. Currently, there is no access strong opioids for those needing palliative care outside of the capital city of Dhaka.[1416]
Greatest needs
The most common need reported by patients in this study was money. In Bangladesh and many other LMICs, the cost of serious or chronic disease is frequently borne by the patient and their family, with limited support from government sources. This expenditure can quickly lead a patient and family to exhaust their limited savings, and this may force the patient to discontinue treatment. In a study from India, patients often reported losing their job due to their illness which contributed to financial problems.[12] Although we did not specifically examine this specifically, it is possible that loss of employment by the patient or main wage-earner in the family contributed to the need for money among our patients. The need for money may also be linked to the very limited social security net which is available in Bangladesh, leading patients to be concerned about financially supporting their basic needs such as shelter, food, water and electricity. A recent study describing the provision of palliative care in an urban slum in Bangladesh incorporated food packets as part of the support provided to patients and their families.[25] Further studies are needed to explore the characteristics of the financial situation of patients with advanced illness in LMICs and demonstrate the best models of care for this particular need.
Strengths
Our study provides a comprehensive assessment of the needs and experiences of individuals with advanced incurable illness from a wide geographical distribution across the whole country of Bangladesh. We describe a relatively simple methodology, which can easily be implemented to assess psychosocial and spiritual needs through interviews with patients.
Limitations
The use of closed-ended interview questions and convenience sampling methodology may limit our findings’ generalizability. Further exploration of patients’ needs using qualitative methodologies may lead to greater understanding of patients’ experiences.
CONCLUSIONS
There is a significant burden of psychosocial and spiritual concerns among patients with advanced incurable illness in Bangladesh, with sadness being very frequent and of high intensity. Family and friends provide significant emotional and practical support to patients who are seriously ill, but few patients access professional support for these concerns. To reduce suffering, national plans and policies should be developed to address the emotional and spiritual concerns of individuals with advanced illness in all regions of Bangladesh.
Financial support and sponsorship
This study was funded by the National Institute of Population Research and Training of Bangladesh.
Conflicts of interest
There are no conflicts of interest.
Acknowledgments
The authors would like to thank Professor Nezamuddin Ahmad former chairman of the Department of Palliative Medicine, BSMMU for his continuous support. The authors also acknowledge the operational support of the National Institute of Population Research and Training of Bangladesh.
REFERENCES
- An exploratory study of spiritual care at the end of life. Ann Fam Med. 2008;6:406-11.
- [Google Scholar]
- A thematic review of the spirituality literature within palliative care. J Palliat Med. 2006;9:464-79.
- [Google Scholar]
- Depression, hopelessness, and desire for hastened death in terminally ill patients with cancer. JAMA. 2000;284:2907-11.
- [Google Scholar]
- Effect of spiritual well-being on end-of-life despair in terminally-ill cancer patients. Lancet. 2003;361:1603-7.
- [Google Scholar]
- Alleviating the access abyss in palliative care and pain relief-an imperative of universal health coverage: The lancet commission report. Lancet. 2018;391:1391-454.
- [Google Scholar]
- Global Atlas of Palliative Care at the End of Life. London UK: Worldwide Palliative Care Alliance; 2014.
- Disparities in the contribution of low-and middle-income countries to palliative care research. J Pain Symptom Manage. 2010;39:54-68.
- [Google Scholar]
- An integrative review of the concept of spirituality in the health sciences. West J Nurs Res. 2004;26:405-28.
- [Google Scholar]
- Exploration of concerns and role of psychosocial intervention in palliative care a study from India. Ann Acad Med Singapore. 1994;23:256-60.
- [Google Scholar]
- Culture and palliative care: Preferences, communication, meaning, and mutual decision making. J Pain Symptom Manage. 2018;55:1408-19.
- [Google Scholar]
- Psychosocial and spiritual problems of terminally ill patients in Kerala, India. Future Oncol. 2012;8:1183-91.
- [Google Scholar]
- Findings from a Rapid Situational Analysis in Vietnam. In: Ministry of Health. Hanoi, Vietnam: Publishing Department; 2006.
- [Google Scholar]
- Symptom prevalence in patients with advanced, incurable illness in Bangladesh. Indian J Palliat Care. 2017;23:413-8.
- [Google Scholar]
- The mental health workforce gap in low-and middle-income countries: A needs-based approach. Bull World Health Organ. 2011;89:184-94.
- [Google Scholar]
- Mapping levels of palliative care development: A global update. J Pain Symptom Manage. 2013;45:1094-106.
- [Google Scholar]
- Cost and burden of informal caregiving of dependent older people in a rural Indian community. BMC Health Serv Res. 2014;14:207.
- [Google Scholar]
- The health workforce crisis in Bangladesh: Shortage, inappropriate skill-mix and inequitable distribution. Hum Resour Health. 2011;9:3.
- [Google Scholar]
- Psychosocial concerns in patients with advanced cancer: An observational study at regional cancer centre, India. Am J Hosp Palliat Care. 2010;27:316-9.
- [Google Scholar]
- Family perceptions of worry, symptoms, and suffering in the dying. J Palliat Care. 2004;20:20-7.
- [Google Scholar]
- Palliative care in kerala. Problems at presentation in 440 patients with advanced cancer in a South Indian state. Palliat Med. 1996;10:293-8.
- [Google Scholar]
- The use of morphine to control pain in advanced cancer: An investigation of clinical usage in Bangladesh. Palliat Med. 2010;24:707-14.
- [Google Scholar]
- Physicians knowledge and attitude of opioid availability, accessibility and use in pain management in Bangladesh. Bangladesh Med Res Counc Bull. 2014;40:18-24.
- [Google Scholar]
- Access to pain relief and essential opioids in the WHO South-east Asia region: Challenges in implementing drug reforms. WHO South East Asia J Public Health. 2018;7:67-72.
- [Google Scholar]
- Palliative care for slum population: A case from Bangladesh. Eur J Palliat Care. 2017;24:156-60.
- [Google Scholar]