Published in PLoS Med on January 18, 2011
Cohort Profile: the international epidemiological databases to evaluate AIDS (IeDEA) in sub-Saharan Africa. Int J Epidemiol (2011) 3.33
Tuberculosis incidence rates during 8 years of follow-up of an antiretroviral treatment cohort in South Africa: comparison with rates in the community. PLoS One (2012) 2.53
Outcomes of antiretroviral treatment in programmes with and without routine viral load monitoring in Southern Africa. AIDS (2011) 2.38
Universal definition of loss to follow-up in HIV treatment programs: a statistical analysis of 111 facilities in Africa, Asia, and Latin America. PLoS Med (2011) 2.17
Tuberculosis in HIV programmes in lower-income countries: practices and risk factors. Int J Tuberc Lung Dis (2011) 2.15
Outcomes of antiretroviral therapy in children in Asia and Africa: a comparative analysis of the IeDEA pediatric multiregional collaboration. J Acquir Immune Defic Syndr (2013) 1.82
HPTN 071 (PopART): a cluster-randomized trial of the population impact of an HIV combination prevention intervention including universal testing and treatment: mathematical model. PLoS One (2014) 1.66
Outcomes of antiretroviral treatment programs in rural Southern Africa. J Acquir Immune Defic Syndr (2012) 1.60
Mortality and loss to follow-up in the first year of ART: Malawi national ART programme. AIDS (2012) 1.50
Male gender predicts mortality in a large cohort of patients receiving antiretroviral therapy in Uganda. J Int AIDS Soc (2011) 1.46
Estimated mortality of adult HIV-infected patients starting treatment with combination antiretroviral therapy. Sex Transm Infect (2012) 1.41
Mortality in patients with HIV-1 infection starting antiretroviral therapy in South Africa, Europe, or North America: a collaborative analysis of prospective studies. PLoS Med (2014) 1.40
Combination prevention: new hope for stopping the epidemic. Curr HIV/AIDS Rep (2013) 1.36
Patients enrolled in HIV care in Mozambique: baseline characteristics and follow-up outcomes. J Acquir Immune Defic Syndr (2011) 1.32
Are they really lost? "true" status and reasons for treatment discontinuation among HIV infected patients on antiretroviral therapy considered lost to follow up in Urban Malawi. PLoS One (2013) 1.32
Viral load monitoring of antiretroviral therapy, cohort viral load and HIV transmission in Southern Africa: a mathematical modelling analysis. AIDS (2012) 1.26
Association of adherence support and outreach services with total attrition, loss to follow-up, and death among ART patients in sub-Saharan Africa. PLoS One (2012) 1.19
Anti-retroviral treatment outcomes among older adults in Zomba district, Malawi. PLoS One (2011) 1.18
Estimating loss to follow-up in HIV-infected patients on antiretroviral therapy: the effect of the competing risk of death in Zambia and Switzerland. PLoS One (2011) 1.15
Heterogeneity in outcomes of treated HIV-positive patients in Europe and North America: relation with patient and cohort characteristics. Int J Epidemiol (2012) 1.11
Impact of definitions of loss to follow-up on estimates of retention, disease progression, and mortality: application to an HIV program in Mozambique. Am J Epidemiol (2013) 1.11
Effect of age on immunological response in the first year of antiretroviral therapy in HIV-1-infected adults in West Africa. AIDS (2012) 1.11
Mortality among adults transferred and lost to follow-up from antiretroviral therapy programmes in South Africa: a multicenter cohort study. J Acquir Immune Defic Syndr (2014) 1.11
Monitoring of antiretroviral therapy and mortality in HIV programmes in Malawi, South Africa and Zambia: mathematical modelling study. PLoS One (2013) 1.11
Short and long term retention in antiretroviral care in health facilities in rural Malawi and Zimbabwe. BMC Health Serv Res (2012) 0.98
Death and seeking alternative therapy largely accounted for lost to follow-up of patients on ART in northwest Ethiopia: a community tracking survey. PLoS One (2013) 0.95
Loss to Followup in HIV-Infected Patients from Asia-Pacific Region: Results from TAHOD. AIDS Res Treat (2012) 0.95
Comparison of methods to correct survival estimates and survival regression analysis on a large HIV African cohort. PLoS One (2012) 0.95
Trends in mortality and loss to follow-up in HIV care at the Nkongsamba Regional hospital, Cameroon. BMC Res Notes (2013) 0.95
Loss to clinic and five-year mortality among HIV-infected antiretroviral therapy initiators. PLoS One (2014) 0.94
Loss to follow-up in the Australian HIV Observational Database. Antivir Ther (2014) 0.89
Comparison of methods for correction of mortality estimates for loss to follow-up after ART initiation: a case of the Infectious Diseases Institute, Uganda. PLoS One (2013) 0.89
The cost-effectiveness of monitoring strategies for antiretroviral therapy of HIV infected patients in resource-limited settings: software tool. PLoS One (2015) 0.89
Mortality and loss to follow-up among HIV-infected persons on long-term antiretroviral therapy in Latin America and the Caribbean. J Int AIDS Soc (2015) 0.88
Prevalent tuberculosis and mortality among HAART initiators. AIDS (2012) 0.87
CHOP Chemotherapy for Aggressive Non-Hodgkin Lymphoma with and without HIV in the Antiretroviral Therapy Era in Malawi. PLoS One (2016) 0.87
Observational research on NCDs in HIV-positive populations: conceptual and methodological considerations. J Acquir Immune Defic Syndr (2014) 0.87
Increased mortality among HIV-positive men on antiretroviral therapy: survival differences between sexes explained by late initiation in Uganda. HIV AIDS (Auckl) (2013) 0.85
CD4 trajectory adjusting for dropout among HIV-positive patients receiving combination antiretroviral therapy in an East African HIV care centre. J Int AIDS Soc (2014) 0.85
Outcomes for paediatric Burkitt lymphoma treated with anthracycline-based therapy in Malawi. Br J Haematol (2016) 0.85
Loss to follow-up as a competing risk in an observational study of HIV-1 incidence. PLoS One (2013) 0.84
Trends in and determinants of loss to follow up and early mortality in a rapid expansion of the antiretroviral treatment program in Vietnam: findings from 13 outpatient clinics. PLoS One (2013) 0.84
Implementation and operational research: evaluating outcomes of patients lost to follow-up in a large comprehensive care treatment program in western Kenya. J Acquir Immune Defic Syndr (2015) 0.84
Performance of a mathematical model to forecast lives saved from HIV treatment expansion in resource-limited settings. Med Decis Making (2014) 0.83
A Comparison of Seven Cox Regression-Based Models to Account for Heterogeneity Across Multiple HIV Treatment Cohorts in Latin America and the Caribbean. AIDS Res Hum Retroviruses (2015) 0.83
The predictive value of current haemoglobin levels for incident tuberculosis and/or mortality during long-term antiretroviral therapy in South Africa: a cohort study. BMC Med (2015) 0.83
A novel approach to accounting for loss to follow-up when estimating the relationship between CD4 Count at ART initiation and mortality. PLoS One (2013) 0.83
The Clinical Significance of CD4 Counts in Asian and Caucasian HIV-Infected Populations: Results from TAHOD and AHOD. J Int Assoc Physicians AIDS Care (Chic) (2011) 0.82
Preventing antiretroviral treatment interruptions among HIV/AIDS patients in Africa. PLoS Med (2013) 0.81
Study design issues in evaluating immune biomarkers. Curr Opin HIV AIDS (2013) 0.80
Two-year death and loss to follow-up outcomes by source of referral to HIV care for HIV-infected patients initiating antiretroviral therapy in rural Mozambique. AIDS Res Hum Retroviruses (2014) 0.79
Clinical and Virologic Outcomes After Changes in First Antiretroviral Regimen at 7 Sites in the Caribbean, Central and South America Network. J Acquir Immune Defic Syndr (2016) 0.79
Survival outcomes for first-line antiretroviral therapy in India's ART program. BMC Infect Dis (2016) 0.79
Trends in prevalence of selected opportunistic infections associated with HIV/AIDS in Uganda. BMC Infect Dis (2015) 0.78
Predictors of patient attrition according to different definitions for loss to follow-up: a comparative analysis from Lusaka, Zambia. J Acquir Immune Defic Syndr (2013) 0.76
Trends in prevalence of diarrhoea, Kaposi's sarcoma, bacterial pneumonia, malaria and geohelminths among HIV positive individuals in Uganda. AIDS Res Ther (2015) 0.76
Predictors of dropout from care among HIV-infected patients initiating antiretroviral therapy at a public sector HIV treatment clinic in sub-Saharan Africa. BMC Infect Dis (2016) 0.75
Social and clinical attributes of patients who restart antiretroviral therapy in central and Copperbelt provinces, Zambia: a retrospective longitudinal study. BMC Public Health (2016) 0.75
Mortality related to acute illness and injury in rural Uganda: task shifting to improve outcomes. PLoS One (2015) 0.75
Immunologic response in treatment-naïve HIV-2-infected patients: the IeDEA West Africa cohort. J Int AIDS Soc (2016) 0.75
Trends and Predictors of Mortality Among HIV Positive Patients in the Era of Highly Active Antiretroviral Therapy in Uganda. Infect Dis Rep (2015) 0.75
Pitfalls of practicing cancer epidemiology in resource-limited settings: the case of survival and loss to follow-up after a diagnosis of Kaposi's sarcoma in five countries across sub-Saharan Africa. BMC Cancer (2016) 0.75
Implementation and Operational Research: Impact of Nurse-Targeted Care on HIV Outcomes Among Immunocompromised Persons: A Before-After Study in Uganda. J Acquir Immune Defic Syndr (2016) 0.75
Targeted Spontaneous Reporting: Assessing Opportunities to Conduct Routine Pharmacovigilance for Antiretroviral Treatment on an International Scale. Drug Saf (2016) 0.75
A simple novel method for determining mortality rates in HIV treatment programs worldwide. PLoS Med (2011) 0.75
CYP2B6 genotypes and early efavirenz-based hiv treatment outcomes in botswana. AIDS (2017) 0.75
An Observational Study of the Effect of Patient Outreach on Return to Care: The Earlier the Better. J Acquir Immune Defic Syndr (2017) 0.75
All-cause mortality in HIV-positive adults starting combination antiretroviral therapy: correcting for loss to follow-up. AIDS (2017) 0.75
Mortality of HIV-1-infected patients in the first year of antiretroviral therapy: comparison between low-income and high-income countries. Lancet (2006) 31.79
Patient retention in antiretroviral therapy programs in sub-Saharan Africa: a systematic review. PLoS Med (2007) 19.78
Rapid scale-up of antiretroviral therapy at primary care sites in Zambia: feasibility and early outcomes. JAMA (2006) 17.93
Adherence to antiretroviral therapy in sub-Saharan Africa and North America: a meta-analysis. JAMA (2006) 11.71
The WHO public-health approach to antiretroviral treatment against HIV in resource-limited settings. Lancet (2006) 11.06
Scaling up of highly active antiretroviral therapy in a rural district of Malawi: an effectiveness assessment. Lancet (2006) 10.91
Efficacy of antiretroviral therapy programs in resource-poor settings: a meta-analysis of the published literature. Clin Infect Dis (2005) 9.23
Early loss of HIV-infected patients on potent antiretroviral therapy programmes in lower-income countries. Bull World Health Organ (2008) 8.70
Mortality of patients lost to follow-up in antiretroviral treatment programmes in resource-limited settings: systematic review and meta-analysis. PLoS One (2009) 8.58
True outcomes for patients on antiretroviral therapy who are "lost to follow-up" in Malawi. Bull World Health Organ (2007) 6.81
Prognosis of patients with HIV-1 infection starting antiretroviral therapy in sub-Saharan Africa: a collaborative analysis of scale-up programmes. Lancet (2010) 6.02
Addressing an idiosyncrasy in estimating survival curves using double sampling in the presence of self-selected right censoring. Biometrics (2001) 5.76
Sampling-based approach to determining outcomes of patients lost to follow-up in antiretroviral therapy scale-up programs in Africa. JAMA (2008) 5.68
Antiretroviral therapy in resource-limited settings 1996 to 2006: patient characteristics, treatment regimens and monitoring in sub-Saharan Africa, Asia and Latin America. Trop Med Int Health (2008) 5.32
Responding to the HIV pandemic: the power of an academic medical partnership. Acad Med (2007) 4.73
Antiretroviral therapy and early mortality in South Africa. Bull World Health Organ (2008) 4.54
Understanding reasons for and outcomes of patients lost to follow-up in antiretroviral therapy programs in Africa through a sampling-based approach. J Acquir Immune Defic Syndr (2010) 4.20
Characteristics and outcomes of adult patients lost to follow-up at an antiretroviral treatment clinic in johannesburg, South Africa. J Acquir Immune Defic Syndr (2008) 3.99
Electronic medical record systems, data quality and loss to follow-up: survey of antiretroviral therapy programmes in resource-limited settings. Bull World Health Organ (2008) 3.85
Using vital registration data to update mortality among patients lost to follow-up from ART programmes: evidence from the Themba Lethu Clinic, South Africa. Trop Med Int Health (2010) 3.79
Public-health and individual approaches to antiretroviral therapy: township South Africa and Switzerland compared. PLoS Med (2008) 3.56
Cohort profile: the North American AIDS Cohort Collaboration on Research and Design (NA-ACCORD). Int J Epidemiol (2007) 3.46
Cohort Profile: Caribbean, Central and South America Network for HIV research (CCASAnet) collaboration within the International Epidemiologic Databases to Evaluate AIDS (IeDEA) programme. Int J Epidemiol (2007) 3.22
Cohort Profile: Antiretroviral Therapy in Lower Income Countries (ART-LINC): international collaboration of treatment cohorts. Int J Epidemiol (2005) 3.19
Sampling-based approaches to improve estimation of mortality among patient dropouts: experience from a large PEPFAR-funded program in Western Kenya. PLoS One (2008) 3.19
Impact of vital status investigation procedures on estimates of survival in cohorts of HIV-infected patients from Sub-Saharan Africa. J Acquir Immune Defic Syndr (2004) 2.99
Cost-effectiveness of preventing loss to follow-up in HIV treatment programs: a Côte d'Ivoire appraisal. PLoS Med (2009) 2.13
AMPATH: living proof that no one has to die from HIV. J Gen Intern Med (2007) 1.67
The nomogram epidemic: resurgence of a medical relic. Ann Intern Med (2008) 1.50
Mortality of HIV-1-infected patients in the first year of antiretroviral therapy: comparison between low-income and high-income countries. Lancet (2006) 31.79
Patient retention in antiretroviral therapy programs in sub-Saharan Africa: a systematic review. PLoS Med (2007) 19.78
Early antiretroviral therapy and mortality among HIV-infected infants. N Engl J Med (2008) 17.12
Initiation of Antiretroviral Therapy in Early Asymptomatic HIV Infection. N Engl J Med (2015) 15.06
Early mortality among adults accessing antiretroviral treatment programmes in sub-Saharan Africa. AIDS (2008) 13.25
Early mortality among adults accessing a community-based antiretroviral service in South Africa: implications for programme design. AIDS (2005) 11.25
Retention in HIV care between testing and treatment in sub-Saharan Africa: a systematic review. PLoS Med (2011) 11.05
Determinants of mortality and nondeath losses from an antiretroviral treatment service in South Africa: implications for program evaluation. Clin Infect Dis (2006) 9.25
Early loss of HIV-infected patients on potent antiretroviral therapy programmes in lower-income countries. Bull World Health Organ (2008) 8.70
Viability and effectiveness of large-scale HIV treatment initiatives in sub-Saharan Africa: experience from western Kenya. AIDS (2006) 7.99
Diagnostic accuracy of a low-cost, urine antigen, point-of-care screening assay for HIV-associated pulmonary tuberculosis before antiretroviral therapy: a descriptive study. Lancet Infect Dis (2011) 7.23
Tuberculosis among HIV-infected patients receiving HAART: long term incidence and risk factors in a South African cohort. AIDS (2005) 6.83
Major clinical outcomes in antiretroviral therapy (ART)-naive participants and in those not receiving ART at baseline in the SMART study. J Infect Dis (2008) 6.73
Effect of highly active antiretroviral therapy on incidence of tuberculosis in South Africa: a cohort study. Lancet (2002) 6.54
Rapid scale-up of a community-based HIV treatment service: programme performance over 3 consecutive years in Guguletu, South Africa. S Afr Med J (2006) 6.29
Prognosis of patients with HIV-1 infection starting antiretroviral therapy in sub-Saharan Africa: a collaborative analysis of scale-up programmes. Lancet (2010) 6.02
Impact of HIV infection on the epidemiology of tuberculosis in a peri-urban community in South Africa: the need for age-specific interventions. Clin Infect Dis (2006) 5.68
Sampling-based approach to determining outcomes of patients lost to follow-up in antiretroviral therapy scale-up programs in Africa. JAMA (2008) 5.68
Adherence is not a barrier to successful antiretroviral therapy in South Africa. AIDS (2003) 5.52
Tuberculosis-associated immune reconstitution disease: incidence, risk factors and impact in an antiretroviral treatment service in South Africa. AIDS (2007) 5.41
Nurse versus doctor management of HIV-infected patients receiving antiretroviral therapy (CIPRA-SA): a randomised non-inferiority trial. Lancet (2010) 5.41
Ambulatory short-course high-dose oral amoxicillin for treatment of severe pneumonia in children: a randomised equivalency trial. Lancet (2008) 5.40
Antiretroviral therapy in resource-limited settings 1996 to 2006: patient characteristics, treatment regimens and monitoring in sub-Saharan Africa, Asia and Latin America. Trop Med Int Health (2008) 5.32
Fungal burden, early fungicidal activity, and outcome in cryptococcal meningitis in antiretroviral-naive or antiretroviral-experienced patients treated with amphotericin B or fluconazole. Clin Infect Dis (2007) 5.32
A Trial of Early Antiretrovirals and Isoniazid Preventive Therapy in Africa. N Engl J Med (2015) 5.30
Screening for HIV-associated tuberculosis and rifampicin resistance before antiretroviral therapy using the Xpert MTB/RIF assay: a prospective study. PLoS Med (2011) 5.06
Temporal changes in programme outcomes among adult patients initiating antiretroviral therapy across South Africa, 2002-2007. AIDS (2010) 4.68
Gender and the use of antiretroviral treatment in resource-constrained settings: findings from a multicenter collaboration. J Womens Health (Larchmt) (2008) 4.38
When to start antiretroviral therapy in resource-limited settings. Ann Intern Med (2009) 4.31
Development of a standardized screening rule for tuberculosis in people living with HIV in resource-constrained settings: individual participant data meta-analysis of observational studies. PLoS Med (2011) 4.29
Daily acyclovir for HIV-1 disease progression in people dually infected with HIV-1 and herpes simplex virus type 2: a randomised placebo-controlled trial. Lancet (2010) 4.23
Overestimates of survival after HAART: implications for global scale-up efforts. PLoS One (2008) 4.20
Short-term and long-term risk of tuberculosis associated with CD4 cell recovery during antiretroviral therapy in South Africa. AIDS (2009) 4.07
High-dose amphotericin B with flucytosine for the treatment of cryptococcal meningitis in HIV-infected patients: a randomized trial. Clin Infect Dis (2008) 3.92
Changing mortality risk associated with CD4 cell response to antiretroviral therapy in South Africa. AIDS (2009) 3.91
Risk factors for active tuberculosis after antiretroviral treatment initiation in Abidjan. Am J Respir Crit Care Med (2005) 3.90
Electronic medical record systems, data quality and loss to follow-up: survey of antiretroviral therapy programmes in resource-limited settings. Bull World Health Organ (2008) 3.85
Retention in care among HIV-infected patients in resource-limited settings: emerging insights and new directions. Curr HIV/AIDS Rep (2010) 3.80
Using vital registration data to update mortality among patients lost to follow-up from ART programmes: evidence from the Themba Lethu Clinic, South Africa. Trop Med Int Health (2010) 3.79
Screening for cryptococcal antigenemia in patients accessing an antiretroviral treatment program in South Africa. Clin Infect Dis (2009) 3.77
Incidence and determinants of mortality and morbidity following early antiretroviral therapy initiation in HIV-infected adults in West Africa. AIDS (2007) 3.70
Conservation of first-line antiretroviral treatment regimen where therapeutic options are limited. Antivir Ther (2007) 3.60
Public-health and individual approaches to antiretroviral therapy: township South Africa and Switzerland compared. PLoS Med (2008) 3.56
Community case management of severe pneumonia with oral amoxicillin in children aged 2-59 months in Haripur district, Pakistan: a cluster randomised trial. Lancet (2011) 3.51
Linkage to HIV care and antiretroviral therapy in Cape Town, South Africa. PLoS One (2010) 3.48
New regimens to prevent tuberculosis in adults with HIV infection. N Engl J Med (2011) 3.46
Mortality of HIV-infected patients starting antiretroviral therapy in sub-Saharan Africa: comparison with HIV-unrelated mortality. PLoS Med (2009) 3.42
CD4 decline and incidence of opportunistic infections in Cape Town, South Africa: implications for prophylaxis and treatment. J Acquir Immune Defic Syndr (2006) 3.39
Early loss to follow up after enrolment in pre-ART care at a large public clinic in Johannesburg, South Africa. Trop Med Int Health (2010) 3.34
Long-term immunologic response to antiretroviral therapy in low-income countries: a collaborative analysis of prospective studies. AIDS (2008) 3.31
Substitutions due to antiretroviral toxicity or contraindication in the first 3 years of antiretroviral therapy in a large South African cohort. Antivir Ther (2007) 3.27
Persistence of virus-reactive serum immunoglobulin m antibody in confirmed west nile virus encephalitis cases. Emerg Infect Dis (2003) 3.17
Cryptococcocal immune reconstitution disease: a major cause of early mortality in a South African antiretroviral programme. AIDS (2005) 3.16
Cost-effectiveness of HIV treatment as prevention in serodiscordant couples. N Engl J Med (2013) 3.10
Effect of training traditional birth attendants on neonatal mortality (Lufwanyama Neonatal Survival Project): randomised controlled study. BMJ (2011) 3.09
Mammography surveillance and mortality in older breast cancer survivors. J Clin Oncol (2007) 3.06
Isoniazid preventive therapy, HAART and tuberculosis risk in HIV-infected adults in South Africa: a prospective cohort. AIDS (2009) 3.06
Independent association between rate of clearance of infection and clinical outcome of HIV-associated cryptococcal meningitis: analysis of a combined cohort of 262 patients. Clin Infect Dis (2009) 3.05
Cost-effectiveness of highly active antiretroviral therapy in South Africa. PLoS Med (2005) 3.01
Late-disease stage at presentation to an HIV clinic in the era of free antiretroviral therapy in Sub-Saharan Africa. J Acquir Immune Defic Syndr (2009) 2.99
Accuracy of WHO CD4 cell count criteria for virological failure of antiretroviral therapy. Trop Med Int Health (2009) 2.99
Outcomes of the South African National Antiretroviral Treatment Programme for children: the IeDEA Southern Africa collaboration. S Afr Med J (2009) 2.97
Loss to follow-up and mortality among pregnant women referred to a community clinic for antiretroviral treatment. AIDS (2008) 2.96
Scaling up antiretroviral therapy in South Africa: the impact of speed on survival. J Infect Dis (2008) 2.96
AIDS among older children and adolescents in Southern Africa: projecting the time course and magnitude of the epidemic. AIDS (2009) 2.92
Advanced HIV disease at entry into HIV care and initiation of antiretroviral therapy during 2006-2011: findings from four sub-saharan African countries. Clin Infect Dis (2013) 2.91
Tuberculosis during the first year of antiretroviral therapy in a South African cohort using an intensive pretreatment screening strategy. AIDS (2010) 2.90
Global strategies to reduce the price of antiretroviral medicines: evidence from transactional databases. Bull World Health Organ (2009) 2.85
When to initiate highly active antiretroviral therapy in sub-Saharan Africa? A South African cost-effectiveness study. Antivir Ther (2006) 2.85
Immunodeficiency at the start of combination antiretroviral therapy in low-, middle-, and high-income countries. J Acquir Immune Defic Syndr (2014) 2.79
Initiating highly active antiretroviral therapy in sub-Saharan Africa: an assessment of the revised World Health Organization scaling-up guidelines. AIDS (2004) 2.78
Switching to second-line antiretroviral therapy in resource-limited settings: comparison of programmes with and without viral load monitoring. AIDS (2009) 2.75
Tuberculosis in antiretroviral treatment services in resource-limited settings: addressing the challenges of screening and diagnosis. J Infect Dis (2011) 2.72
Yield of HIV-associated tuberculosis during intensified case finding in resource-limited settings: a systematic review and meta-analysis. Lancet Infect Dis (2010) 2.72
Discordant responses to potent antiretroviral treatment in previously naive HIV-1-infected adults initiating treatment in resource-constrained countries: the antiretroviral therapy in low-income countries (ART-LINC) collaboration. J Acquir Immune Defic Syndr (2007) 2.71