The Effect of Poor Social Support on Depression among HIV/AIDS Patients in Ethiopia: A Systematic Review and Meta-Analysis

Depression among people living with HIV at a district hospital in KwaZulu-Natal, South Africa

BACKGROUND

 Depression is a debilitating condition worldwide and a major contributor to the overall global burden of disease. The prevalence of depression is estimated to be higher in people living with HIV and AIDS (PLWHA) compared to the general population, with disease related complications increasing when mental health problems remain untreated. The aim of the study was to determine the prevalence of depression among PLWHA who attend a district hospital ART clinic in KwaZulu-Natal (KZN), South Africa (SA).

METHODS

 Using strict systematic sampling, a descriptive cross-sectional study was employed with 121 adult outpatients attending an antiretroviral clinic at a district hospital in KZN, SA. Their biographical and clinical characteristics were obtained through a questionnaire and medical records, while depression was evaluated using the PHQ-9 scale. The data were analysed using descriptive and inferential statistics.

RESULTS

 A total of 121 participants were recruited for this study. The prevalence of depression was 19.8% and significantly associated with a poor support system (adjusted odds ratio [aOR] = 3.60, p = 0.010). Female patients were more likely to have depressive symptoms than males (aOR = 0.73; confidence interval: 0.28-1.90) although this was not statistically significant. Age, marital status and viral load were not contributors to depression.

CONCLUSION

 Routine screening for depression among PLWHA at primary health care (PHC) level may improve detection rates, earlier treatment and overall health outcomes.Contribution: The results emphasise the need for patient-centeredness and holistic care that involves addressing mental health for PLWHA, given that HIV is a lifelong condition.

Interaction of social support and depressive symptoms on antiretroviral therapy adherence among people living with HIV in South Africa

Background

Depression consistently emerges as a significant predictor of poor antiretroviral therapy (ART) adherence among adult people living with human immunodeficiency virus (PLHIV). However, a gap exists regarding how social support and depressive symptoms can interact to influence ART adherence among adult PLHIV in South Africa (SA).

Aim

To investigate the interaction between social support and depressive symptoms on ART adherence among adult PLHIV.

Setting

A tertiary hospital in Durban, KwaZulu-Natal province of SA.

Methods

Utilising a quantitative cross-sectional research design along with time location sampling technique (TLS); the study recruited 201 adult patients enrolled in an ART programme.

Results

The results indicated that depressive symptoms were significantly associated with ART adherence with and without the interaction (B = -0.105; odds ratios [OR] 0.901; 95% confidence intervals [CI] = 0.827, 0.981; p = 0.016), while social support was not significantly associated with ART adherence (B = 0.007; OR 1.007; 95%CI = 0.989, 1.025; p = 0.475). However, a statistically significant interaction was found between social support and depressive symptoms (B = -0.006; OR 0.994; 95%CI = 0.989, 1.000; p = 0.037) on ART adherence.

Conclusion

Based on the results, depressive symptoms significantly influenced ART adherence. However, social support did not buffer the adverse effects of clinical depression associated with poor ART adherence.

Contribution

This study provides an evidence-based approach to address gaps in the mental health and social well-being of PLHIV in the context of ART adherence.

Perceived stigma and depression among the HIV-positive adult people in Ethiopia: A systematic review and meta-analysis

INTRODUCTION

Depression is one of the most common psychiatric disorders, affecting approximately 60% of people infected with the human immunodeficiency virus (HIV). Low and middle-income countries (LMICs), including Ethiopia, bear a disproportionate burden of depression among HIV/AIDS patients. Several factors, including perceived stigma, have been linked to increased depression among HIV/AIDS patients. Therefore, we aimed to estimate the pooled effect of perceived stigma on depression among HIV/AIDS patients in Ethiopia.

METHODS

For this systematic review and meta-analysis, we systematically retrieved all relevant studies starting from January 1, 2000 to June 1, 2022 from PubMed, HINARI, and Google Scholar. This review included observational studies that reported the effect of perceived stigma on the prevalence of depression among HIV-positive adults in Ethiopia. The effect estimate of the pooled effect of perceived stigma on depression was conducted using DerSimonian-Laird's random effect model using STATA/MP version 16. An adjusted odds ratio (AOR), along with a 95% confidence interval (CI), was conducted to estimate the strength of the association between perceived stigma and depression.

RESULTS

Eleven studies with a total of 4,153 HIV-positive adults were included for meta-analysis. The results of the meta-analysis revealed that the odds of depression were higher among patients with perceived stigma (AOR: 3.78, 95% CI: 2.73, 5.24). The pooled prevalence of depression among HIV/AIDS patients in Ethiopia was 39% (95% CI: 32%, 46%) (I2 = 98%, p ≤ 0.0001). The subgroup analysis revealed that the primary studies conducted in the Oromia region had the highest pooled prevalence of depression at 48% (95% CI: 32%, 63%).

CONCLUSION

The pooled estimates of the meta-analysis revealed that perceived stigma and depression were strongly associated. Stigma and depression screenings should be carried out for additional treatments and prevention, and programs supporting Ethiopia's PLWHA population should be strengthened.

Sleep quality mediates the effect of medical social support on depression symptoms in patients with HIV/AIDS

OBJECTIVES

The purpose of our study is to further understanding of the depression symptoms of HIV/AIDS patients in Guilin, Guangxi via exploring whether there is a mediating effect of sleep quality on medical-social support and depression symptoms and therefore provide a theoretical basis for application of medical-social support to alleviate depression symptoms of HIV/AIDS patients.

METHODS

A convenience sampling method was used to select 200 HIV/AIDS patients for the study. Depression symptoms, sleep quality, and medical-social support of the study participants were investigated using The Center for Epidemiological Studies Depression Scale (CES-D), The Pittsburg Sleep Quality Index (PSQI), and The Medical Outcomes Study Social Support Survey (MOS-SSS), respectively. Predictors of depression symptoms were explored by multiple linear regression, and Pearson correlation was used to analyze the relationship between sleep quality, medical-social support, and depression symptoms. Mediating effect analysis was performed by nonparametric Bootstrap test.

RESULTS

In this study, the incidence of depression symptoms was 54.4%. Multiple linear regression analysis showed that leanness (β = 0.161, P = 0.008), obesity (β = 0.186, P = 0.002), sleep quality score > 7 (β = 0.331, P < 0.001), and medical-social support score > 56 (β = -0.247, P < 0.001) could influence depression symptoms of HIV and Pearson's correlation analysis demonstrated that there was a two-way correlation between sleep quality, medical social support and depression symptoms (P < 0.05). In addition, Bootstrap tests showed that medical-social support might affect depression symptoms not only directly but also indirectly through the mediating effect of sleep quality with the direct and mediating effects accounting for 77.25% and 22.75% of the total effect, respectively.

CONCLUSION

The prevalence of depression symptoms is high among HIV/AIDS patients in Guilin City. The depressive symptoms of PLWHs(people living with HIV) are related to their sleep quality and medical-social support, and sleep quality partially mediates the relationship between medical-social support and depression symptoms. Therefore, interventions to improve sleep quality and medical-social support have the potential to allay the depression symptoms of HIV/AIDS patients.

A Qualitative Study of the Social Relationship Experiences Across the Life Course Among Black/African American Women Aging With HIV in the South

ABSTRACT

Black/African American women continue to be disproportionately affected by HIV, facing multiple intersecting challenges that influence how they age and effectively manage their health. Supportive social relationships have been shown to help mitigate challenges and improve health in women with HIV, but little is known about Black/African American women's perceptions of social relationships. Guided by Life Course Theory, in-depth life history interviews were conducted with 18 Black/African American women aged 50+ years. In older adulthood, most important relationships among Black/African American women were with their adult children and grandchildren, intimate partners, God, and friends from the community. Factors that influenced relationships over time included: (a) a desire to build a community; (b) a need to empower oneself and give back; (c) yearning to engage the younger generation; and (d) battling HIV stigma. Older Black/African American women with HIV played a critical role in the education of the younger generation.

Psychometric and Circumplex Properties Evaluation of the International Personality Item Pool-Interpersonal Circumplex (IPIP-IPC) in Chinese People Living with HIV (PLWH)

Background and Purpose

With the improved life expectancy of people living with HIV (PLWH) due to widespread use of antiretroviral therapy (ART), there is a greater emphasis on enhancing long-term well-being and overall quality of life for PLWH. Understanding interpersonal personalities of PLWH can gain further insight into how to improve the overall quality of life in this population. The International Personality Item Pool-Interpersonal Circumplex (IPIP-IPC) scale has been developed to assess interpersonal personalities of individuals, and this scale has been translated into Chinese. However, the Chinese version of IPIP-IPC has not been tested among PLWH in China. In this study, we aimed to test the psychometric properties and circumplex structure of this scale.

Methods

This study was based on cross-sectional, multi-center, large sample data. We employed the Chinese version of IPIP-IPC scale on 3040 PLWH from April 2022 to April 2023 in China to test its psychometric as well as circumplex properties. The structural summary method (SSM) was employed to analyze the circumplex structure of the scale.

Results

The total scale exhibited a Cronbach's alpha of 0.85 and McDonald's omega of 0.91. Out of the 288 possible relationships, 275 relationships satisfy the circular properties hypothesis. The scale demonstrates good reliability and validity, meeting the requirements of psychometrics.

Conclusion

Our findings demonstrate that the Chinese version of the IPIP-IPC scale is a reliable tool for evaluating interpersonal personalities in this population. These results highlight the validity and applicability of the IPIP-IPC scale specifically in the Chinese context, providing valuable insights into the intricacies of interpersonal traits among PLWH.

HIV-related stress predicts depression over five years among people living with HIV

Introduction

Extant literature has demonstrated significant associations between HIV-related stress, social support, and depression among PLWH. However, little research has been conducted on the changes in such associations over time. Our study aims to explore the longitudinal relationship between HIV-related stress, social support, and depression among PLWH over five years.

Methods

320 PLWH were recruited from Changsha Center for Disease Control and Prevention (CDC), Hunan Province, China. They were assessed for depressive symptoms, HIV-related stress, and social support within 1 month of HIV diagnosis, 1 year after diagnosis, and five years after diagnosis, respectively. Relationships between these variables were examined using a fixed effect model.

Result

The prevalence of depressive symptoms within the first month, first year, and fifth years of HIV diagnosis was 35, 12.2, and 14.7%, respectively. Emotional stress (β: 0.730, 95% CI: 0.648, 0.811), social stress (β: 0.066, 95% CI: 0.010, 0.123), instrumental stress (β: 0.133, 95% CI:0.046, 0.221) positively predicted depression, while social support utilization (β: -0.176, 95% CI: -0.303, -0.049) negatively predicted depression.

Conclusion

Our study suggests that HIV-related stress and social support predict depressive symptoms over time among PLWH and that reducing HIV-related stress and improving social support in the early stages of diagnosis is extremely important in preventing depressive symptoms among PLWH.

"I'm Getting Life from the Treatment": Perceptions of Life and Death Among Middle-Aged and Older Medication-Adherent Persons Living with HIV in Rural South Africa

The widespread availability of health information and treatment for HIV in Southern Africa does not reach all populations. Few programs and materials are developed with middle-aged and older rural individuals living with HIV as the target audience, despite this being a growing population. This vacuum inevitably exacerbates the disjuncture between clinical and experiential knowledge. This study uses in-depth interviews from 2018 with middle-aged and older rural South Africans who self-report medication adherence to ART in order to explore experiences of living with HIV and beliefs about anti-retroviral treatment (ART). Participants revealed a general sense of vulnerability as a major motivation for HIV medication adherence. A majority of the participants believed that death was imminent if they defaulted on ART at any point in time. Although the availability of ART brought hope to many, HIV was still perceived as a death sentence, particularly if ART adherence was imperfect. The study findings suggest a need to examine the psychosocial component of community programs for middle-aged and older people living with HIV. For this growing population that experienced the full course of the epidemic, more research is needed on the burden of psychological and mental health issues emerging from the need for long-term HIV medication adherence.

Prevalence of comorbid depression and associated factors among hospitalized patients with type 2 diabetes mellitus in Hunan, China

BACKGROUND

Depression and diabetes are major health challenges, with heavy economic social burden, and comorbid depression in diabetes could lead to a wide range of poor health outcomes. Although many descriptive studies have highlighted the prevalence of comorbid depression and its associated factors, the situation in Hunan, China, remains unclear. Therefore, this study aimed to identify the prevalence of comorbid depression and associated factors among hospitalized type 2 diabetes mellitus (T2DM) patients in Hunan, China.

METHODS

This cross-sectional study involved 496 patients with T2DM who were referred to the endocrinology inpatient department of Xiangya Hospital affiliated to Central South University, Hunan. Participants' data on socio-demographic status, lifestyle factors, T2DM-related characteristics, and social support were collected. Depression was evaluated using the Hospital Anxiety and Depression Scale-depression subscale. All statistical analyses were conducted using the R software version 4.2.1.

RESULTS

The prevalence of comorbid depression among hospitalized T2DM patients in Hunan was 27.22% (95% Confidence Interval [CI]: 23.3-31.1%). Individuals with depression differed significantly from those without depression in age, educational level, per capita monthly household income, current work status, current smoking status, current drinking status, regular physical activity, duration of diabetes, hypertension, chronic kidney disease, stroke, fatty liver, diabetic nephropathy, diabetic retinopathy, insulin use, HbA1c, and social support. A multivariable logistic regression model showed that insulin users (adjusted OR = 1.86, 95% CI: 1.02-3.42) had a higher risk of depression, while those with regular physical activity (adjusted OR = 0.48, 95% CI: 0.30-0.77) or greater social support (adjusted OR = 0.20, 95% CI: 0.11-0.34) had a lower risk of depression. The area under the curve of the receiver operator characteristic based on this model was 0.741 with a sensitivity of 0.785 and specificity of 0.615.

CONCLUSIONS

Depression was moderately prevalent among hospitalized T2DM patients in Hunan, China. Insulin treatment strategies, regular physical activity, and social support were significantly independently associated with depression, and the multivariable model based on these three factors demonstrated good predictivity, which could be applied in clinical practice.

A Qualitative Exploration of Causes of Depression among Persons Living with HIV Receiving Antiretroviral Therapy in Uganda: Implications for Policy

Introduction

Depression is the fourth leading cause of the global disease burden and worsens the outcome of comorbidities including HIV/AIDS. Depression is particularly problematic among persons living with HIV in sub-Saharan Africa where scarcity of cost-effective interventions is compounded by inadequate understanding of the disease. We examine risk factors for depression among persons living with HIV undergoing antiretroviral treatment in Uganda and discuss policy implications.

Methods

A qualitative study using a narrative approach was conducted, the formative phase of a large study to develop a model for integrating depression management into routine HIV care in Uganda. Participants were purposively sampled at four public health facilities in Mpigi District. In-depth interviews were conducted with four clinicians, three supervisors, and 11 persons living with HIV and suffering from depression, as were three focus group discussions with lay health workers. Exit interviews were conducted with 17 persons living with HIV who completed/interrupted depression treatment but had not been interviewed. Only data collected from persons living with HIV and lay health workers were analysed for the purpose of this paper. A narrative thematic approach was used in data analysis. Findings. There were several pathways through which lack of family social support reportedly led to depression: worries about disclosure in discordant relationships, false perceptions of social support, stigmatisation and discrimination, and domestic violence. Economic/poverty and other causes were identified, but their role was less significant or moderated by family social support.

Conclusion

Family social support plays a dominant role-both directly and indirectly-in influencing depression risk. We propose the mainstreaming of formal psychosocial support and a shift from individual to family-focused counselling that targets both persons living with HIV and their family.

'I am struggling to survive' - limited living conditions increase the burden of HIV: A qualitative study

The human immunodeficiency virus (HIV) continues to have life-limiting health consequences for many individuals and remains a significant threat to global public health. This qualitative study explores the experiences of people living with HIV in Sidama, Ethiopia. Interviews with 19 adults recruited from an HIV outpatient clinic were conducted using a semi-structured interview guide. The analysis method used was systematic text condensation. The results reveal that an HIV diagnosis triggered strong emotions. Economic concerns, stigma, and discrimination also increased the burden of a diagnosis, which could lead to a loss of income or housing. Consequently, informants' ability to maintain a regular life and receive social and psychological support was reduced. Religious faith provided strength to informants, though they stated that some religious leaders do not support antiretroviral therapy. Understanding the everyday challenges of people living with HIV is crucial for health professionals and health programme developers working to promote health and enable people to follow their recommended course of treatment. Person-centred care is recommended. In particular, the poorest should receive attention. It is also crucial to reduce stigma and discriminatory attitudes towards people living with HIV and to motivate faith leaders to prevent HIV stigma and support antiretroviral therapy.

Psychological distress among people living with chronic medical illness and the general population, Northwest Ethiopia: A comparative cross-sectional study

BACKGROUND

Psychological distress is often linked to and negatively affects the outcomes of chronic medical conditions; however, data on psychological distress and its predictors among individuals with chronic medical illnesses are scarce in developing countries like Ethiopia. The main objective of this study was to assess the magnitude and predictors of psychological distress among people living with chronic medical illness and the general population.

METHODS

A comparative cross-sectional study was conducted in Mecha demographic research center, Northwest Ethiopia. The participants were selected from the general population and outpatient departments. Kessler-10 (K-10) was used to assess psychological distress.

RESULT

The magnitude of psychological distress among people living with chronic medical illness and those from the general population was 62.0% and 35.1%, respectively. The odds of psychological distress in people living with chronic medical illness was three times more than the one in the general population. Divorced marital status, family history of chronic medical illness, and low social support were statistically significantly associated with psychological distress in both groups.

CONCLUSION

The magnitude of psychological distress was significantly higher among people living with chronic medical illness. Routine screening of such cases for psychological distress during their visits for their medical illness helps take appropriate therapeutic interventions.

Experiences and coping strategies of somatic symptoms in patients with depressive disorder: A qualitative study

BACKGROUND

Depressive disorder is the most prevalent mental illness and is characterised by the presence of mental and somatic symptoms, with the latter affecting 65.0% to 98.2% of patients with their general function and quality of life.

PURPOSE

The purpose of this study aimed to explore the experiences and coping strategies of somatic symptoms in Chinese patients with depressive disorder, and to gain new insight into the illness and the health care provided to patients.

METHODS

Semi-structured, in-depth interviews were conducted with 15 patients diagnosed with depressive disorder according to international classification of diseases 10th revision. The interviews were transcribed verbatim and the thematic analysis was adapted to the data. MAXQDA10 software was used to organise, encode, classify, induce, and extract themes.

RESULTS

Four major themes were extracted from the interviews: (1) descriptions of symptoms; (2) perceptions of the symptoms; (3) symptom disturbance; and (4) coping strategies of symptoms. Within the first theme, patients identified the following sub-themes: complex experiences of somatic symptoms, which were mainly in the neuromuscular system, circulatory respiratory system, gastrointestinal system and some symptoms without obvious systemic classification; difficulty in locating symptoms accurately; and being not consistent with examination results. The second theme included patient's inadequate understanding of somatic symptoms; and denial of the link between physical discomfort and depression. Disturbance of somatic symptoms embraced three sub-themes: (1) Uncertainty about somatic symptoms; (2) Struggling with daily life; (3) Impact on social activities; (4) feeling a decrease in family support. Lastly, coping strategies taken by patients in the face of various symptoms mainly included relying on drug treatment, avoiding stressors, diverting attention, and compromise or acceptance.

CONCLUSIONS

Patients with depressive disorder experience a variety of somatic symptoms that have a negative impact on social function and reduce their quality of life. Patients did not have an adequate understanding of their physical discomfort and lacked effective coping strategies for these somatic symptoms. Professional staff should pay more attention to patients' somatic symptoms and focus on targeted symptom management to facilitate patient recovery.

Family and Social Support Among Patients on Anti-Retroviral Therapy in West Wollega Zone Public Hospitals, Western Ethiopia: A Facility-Based Cross-Sectional Study

Background

Poor family and social support is a problem for patients taking antiretroviral therapy (ART), but it protects them against the negative consequences of stress, reducing morbidity and mortality among peoples living with human immunodeficiency virus (PLWHIV).

Objective

This study aimed to assess family and social support and the associated factors among patients on antiretroviral therapy in West Wollega Public Hospitals.

Methods

A facility-based cross-sectional study design was conducted among 329 respondents attending antiretroviral therapy (ARV) clinics in West Wollega Public Hospitals from September 1–30, 2020. Data were collected by simple random sampling methods using an interviewer-administered questionnaire. Bivariate and multivariate logistic regression analysis was used. The strength and presence of statistical association were assessed using adjusted odds ratio with a 95% confidence interval.

Results

About 266 (66.4%) of the respondents had low family and social support. Being female sex [AOR (95% CI)=0.066 (0.013–0.338)], failing to discuss with family or society [AOR (95% CI)=0.275 (0.100–0.753)], lack of information on support [AOR (95% CI)=0.314 (0.104–0.951)], and non-disclosure of HIV status to family [AOR (95% CI)=0.227 (0.084–0.916)] were associated with family and social support.

Conclusion

In this study, family and social support to people living with HIV/AIDS is low. Being female sex, feelings of negative treatment, lack of discussion on support, lack of information about support, and failure to disclose HIV status were associated with low family and social support. Information, education, and communication should be intensified to increase the awareness of the community, family, and people living with HIV related to support for people living with HIV.

Triple Burden of Neurocognitive Impairment and Co-occurring Depression and Anxiety Among People Living With HIV in Bahir Dar, Ethiopia: A Multicenter Study

BACKGROUND

Neurocognitive impairment is associated with psychological morbidities, such as depression and anxiety, among people living with HIV. The presence of these comorbidities affects viral load suppression, treatment adherence, quality of life, treatment outcomes, and functionality. Despite this fact, there is a dearth of studies that examined the triple burden of neurocognitive impairment and co-occurring depression and anxiety among antiretroviral therapy attendees in Ethiopia. This study aimed to assess the magnitude of HIV-associated neurocognitive impairment and co-occurring depression and anxiety at the same time among people living with HIV/AIDS.

METHOD

We conducted an institution-based multicenter cross-sectional study in Bahir Dar, Northwest Ethiopia. A total of 410 study participants were selected using a systematic random sampling technique. Neurocognitive impairment was assessed using the International HIV Dementia Scale. Co-occurring depression and anxiety were assessed using the Hospital Anxiety and Depression Scale. A semi-structured questionnaire was applied to collect data on sociodemographic and clinical-related characteristics. Data were analyzed using descriptive statistics and univariate and multivariable logistic regression.

RESULTS

Two-thirds (66.8%) of the people living with HIV had neurocognitive impairment. The prevalence of co-occurring depression and anxiety was found in 39.8%. Women with HIV, people with comorbid chronic medical illness, and those under a second-line treatment regimen were factors associated with neurocognitive impairment. Furthermore, pill burden, second-line treatment regimen, HIV clinical stages, social support, HIV-perceived stigma, and neurocognitive impairment were associated factors with co-occurring depression and anxiety.

CONCLUSIONS

We found a high prevalence of neurocognitive impairment and co-occurring depression and anxiety among people living with HIV/AIDs. Further research is needed to assess the clinical course of neurocognitive impairment and co-occurring depression and anxiety.

Frameworks, measures, and interventions for HIV-related internalised stigma and stigma in healthcare and laws and policies: systematic review protocol

INTRODUCTION

There is strong global commitment to eliminate HIV-related stigma. Wide variation exists in frameworks and measures, and many strategies to prevent, reduce or mitigate stigma have been proposed but critical factors determining success or failure remain elusive.

METHODS AND ANALYSIS

Building on existing knowledge syntheses, we designed a systematic review to identify frameworks, measures and intervention evaluations aiming to address internalised stigma, stigma and discrimination in healthcare, and stigma and discrimination at the legal or policy level. The review addresses four key questions (KQ): KQ1: Which conceptual frameworks have been proposed to assess internal stigma, stigma and discrimination experienced in healthcare settings, and stigma and discrimination entrenched in national laws and policies? KQ2: Which measures of stigma have been proposed and what are their descriptive properties? KQ3: Which interventions have been evaluated that aimed to reduce these types of stigma and discrimination or mitigate their adverse effects and what are the effectiveness and unintended consequences? KQ4: What common 'critical factors for success or failure' can be identified across interventions that have been evaluated? We will search PubMed, PsycINFO, Web of Science, Universal Human Rights Index, HeinOnline, PAIS, HIV Legal Network, CDSR, Campbell Collaboration, PROSPERO and Open Science Framework. Critical appraisal will assess the source, processes and consensus finding for frameworks; COnsensus-based Standards for the selection of health Measurement Instruments criteria for measures; and risk of bias for interventions. Quality of evidence grading will apply . A gap analysis will provide targeted recommendations for future research. We will establish a compendium of frameworks, a comprehensive catalogue of available measures, and a synthesis of intervention characteristics to advance the science of HIV-related stigma.

PROSPERO REGISTRATION NUMBER

CRD42021249348.