Published in J Acquir Immune Defic Syndr on January 01, 2009
From access to engagement: measuring retention in outpatient HIV clinical care. AIDS Patient Care STDS (2010) 3.03
Establishment, retention, and loss to follow-up in outpatient HIV care. J Acquir Immune Defic Syndr (2012) 2.19
Retention among North American HIV-infected persons in clinical care, 2000-2008. J Acquir Immune Defic Syndr (2013) 1.73
Mental health treatment to reduce HIV transmission risk behavior: a positive prevention model. AIDS Behav (2010) 1.67
Linkage and retention in HIV care among men who have sex with men in the United States. Clin Infect Dis (2011) 1.59
Enrollment, retention, and visit attendance in the University of North Carolina Center for AIDS Research HIV clinical cohort, 2001-2007. AIDS Res Hum Retroviruses (2010) 1.58
Persons newly diagnosed with HIV infection are at high risk for depression and poor linkage to care: results from the Steps Study. AIDS Behav (2011) 1.54
Longitudinal changes in engagement in care and viral suppression for HIV-infected injection drug users. AIDS (2013) 1.49
Missed office visits and risk of mortality among HIV-infected subjects in a large healthcare system in the United States. AIDS Patient Care STDS (2013) 1.43
Predicting virologic failure in an HIV clinic. Clin Infect Dis (2010) 1.39
Essential components of effective HIV care: a policy paper of the HIV Medicine Association of the Infectious Diseases Society of America and the Ryan White Medical Providers Coalition. Clin Infect Dis (2011) 1.36
Higher quality communication and relationships are associated with improved patient engagement in HIV care. J Acquir Immune Defic Syndr (2013) 1.35
Understanding the behavioral determinants of retention in HIV care: a qualitative evaluation of a situated information, motivation, behavioral skills model of care initiation and maintenance. AIDS Patient Care STDS (2012) 1.34
"Taking a half day at a time:" patient perspectives and the HIV engagement in care continuum. AIDS Patient Care STDS (2013) 1.27
Using the HIV surveillance system to monitor the National HIV/AIDS Strategy. Am J Public Health (2012) 1.27
Disparities in outcomes for African American and Latino subjects in the Flexible Initial Retrovirus Suppressive Therapies (FIRST) trial. AIDS Patient Care STDS (2010) 1.23
High levels of antiretroviral use and viral suppression among persons in HIV care in the United States, 2010. J Acquir Immune Defic Syndr (2013) 1.23
Risk factors for missed HIV primary care visits among men who have sex with men. J Behav Med (2011) 1.21
Keeping them in "STYLE": finding, linking, and retaining young HIV-positive black and Latino men who have sex with men in care. AIDS Patient Care STDS (2010) 1.18
Predictors of success with highly active antiretroviral therapy in an antiretroviral-naive urban population. AIDS Res Hum Retroviruses (2010) 1.07
The role of cultural distance between patient and provider in explaining racial/ethnic disparities in HIV care. Patient Educ Couns (2011) 1.03
The association of clinical follow-up intervals in HIV-infected persons with viral suppression on subsequent viral suppression. AIDS Patient Care STDS (2013) 1.02
Childhood trauma and health outcomes in HIV-infected patients: an exploration of causal pathways. J Acquir Immune Defic Syndr (2012) 1.00
The interplay of sociodemographic factors on virologic suppression among a U.S. outpatient HIV clinic population. AIDS Patient Care STDS (2010) 0.97
Medical mistrust is related to lower longitudinal medication adherence among African-American males with HIV. J Health Psychol (2014) 0.96
Comparative efficacy versus effectiveness of initial antiretroviral therapy in clinical trials versus routine care. Clin Infect Dis (2010) 0.94
Development of a personalized bidirectional text messaging tool for HIV adherence assessment and intervention among substance abusers. J Subst Abuse Treat (2013) 0.93
Routine depression screening in an HIV clinic cohort identifies patients with complex psychiatric co-morbidities who show significant response to treatment. AIDS Behav (2013) 0.92
Hospitalization rates of people living with HIV in the United States, 2009. Public Health Rep (2014) 0.92
Sorting through the lost and found: are patient perceptions of engagement in care consistent with standard continuum of care measures? J Acquir Immune Defic Syndr (2015) 0.89
Risk and protective factors for retention in HIV care. AIDS Behav (2014) 0.87
Ten-year Survival by Race/Ethnicity and Sex Among Treated, HIV-infected Adults in the United States. Clin Infect Dis (2015) 0.86
African American race and HIV virological suppression: beyond disparities in clinic attendance. Am J Epidemiol (2014) 0.85
Teleconsultation for clinicians who provide human immunodeficiency virus care: experience of the national HIV telephone consultation service. Telemed J E Health (2011) 0.85
Retention in care within 1 year of initial HIV care visit in a multisite US cohort: who's in and who's out? J Int Assoc Provid AIDS Care (2014) 0.84
Racial/ethnic differences in trust in health care: HIV conspiracy beliefs and vaccine research participation. J Gen Intern Med (2014) 0.83
Understanding how adherence goals promote adherence behaviours: a repeated measure observational study with HIV seropositive patients. BMC Public Health (2012) 0.83
A pilot study of delivering peer health messages in an HIV clinic via mobile media. Telemed J E Health (2012) 0.82
Geographic Variations in Retention in Care among HIV-Infected Adults in the United States. PLoS One (2016) 0.81
The role of at-risk alcohol/drug use and treatment in appointment attendance and virologic suppression among HIV(+) African Americans. AIDS Res Hum Retroviruses (2014) 0.81
Disparities in achieving and sustaining viral suppression among a large cohort of HIV-infected persons in care - Washington, DC. AIDS Care (2016) 0.81
The Contribution of Missed Clinic Visits to Disparities in HIV Viral Load Outcomes. Am J Public Health (2015) 0.79
Characteristics of HIV patients who missed their scheduled appointments. Rev Saude Publica (2015) 0.78
Risk factors for short-term virologic outcomes among HIV-infected patients undergoing regimen switch of combination antiretroviral therapy. AIDS Res Hum Retroviruses (2012) 0.78
Enhanced Collection of Laboratory Data in HIV Surveillance Among 5 States with Confidential Name-based HIV Infection Reporting, 2005-2006. Open AIDS J (2012) 0.78
Effects of an intervention addressing information, motivation, and behavioral skills on HIV care adherence in a southern clinic cohort. AIDS Care (2013) 0.78
Factors associated with appointment non-adherence among African-Americans with severe, poorly controlled hypertension. PLoS One (2014) 0.78
Activation of persons living with HIV for treatment, the great study. BMC Public Health (2015) 0.78
Improving access to medicines through centralised dispensing in the public sector: a case study of the Chronic Dispensing Unit in the Western Cape Province, South Africa. BMC Health Serv Res (2015) 0.77
"Keep it simple": older African Americans' preferences for a health literacy intervention in HIV management. Patient Prefer Adherence (2015) 0.77
Positive coping strategies and HIV-related stigma in south India. AIDS Patient Care STDS (2015) 0.77
Pilot RCT of bidirectional text messaging for ART adherence among nonurban substance users with HIV. Health Psychol (2015) 0.77
Obesity is associated with race/sex disparities in diabetes and hypertension prevalence, but not cardiovascular disease, among HIV-infected adults. AIDS Res Hum Retroviruses (2015) 0.77
Clinic Attendance for Antiretroviral Pills Pick-Up among HIV-Positive People in Nepal: Roles of Perceived Family Support and Associated Factors. PLoS One (2016) 0.75
Factors associated with remaining on initial randomized efavirenz-containing regimens. AIDS (2013) 0.75
Antiretroviral treatment use, co-morbidities and clinical outcomes among Aboriginal participants in the Australian HIV Observational Database (AHOD). BMC Infect Dis (2015) 0.75
The role of toxicity-related regimen changes in the development of antiretroviral resistance. AIDS Res Hum Retroviruses (2011) 0.75
Risk Prediction Tool for Medical Appointment Attendance Among HIV-Infected Persons with Unsuppressed Viremia. AIDS Patient Care STDS (2015) 0.75
Uptake and Acceptability of Information and Communication Technology in a Community-Based Cohort of People Who Inject Drugs: Implications for Mobile Health Interventions. JMIR Mhealth Uhealth (2015) 0.75
Disparities in CD4+ T-Lymphocyte Monitoring Among Human Immunodeficiency Virus-Positive Medicaid Beneficiaries: Evidence of Differential Treatment at the Point of Care. Open Forum Infect Dis (2014) 0.75
Sex, Race, and HIV Risk Disparities in Discontinuity of HIV Care After Antiretroviral Therapy Initiation in the United States and Canada. AIDS Patient Care STDS (2017) 0.75
A qualitative study of barriers to and facilitators of optimal engagement in care among PLWH and substance use/misuse. BMC Res Notes (2016) 0.75
Medication possession ratio predicts antiretroviral regimens persistence in Peru. PLoS One (2013) 0.75
Sociodemographic profile and predictors of outpatient clinic attendance among HIV-positive patients initiating antiretroviral therapy in Selangor, Malaysia. Patient Prefer Adherence (2017) 0.75
High Hepatitis C cure rates among black and non-black HIV-infected adults in an urban center. Hepatology (2017) 0.75
Exploring the HIV continuum of care among young black MSM. PLoS One (2017) 0.75
The moderator-mediator variable distinction in social psychological research: conceptual, strategic, and statistical considerations. J Pers Soc Psychol (1986) 124.55
Revised recommendations for HIV testing of adults, adolescents, and pregnant women in health-care settings. MMWR Recomm Rep (2006) 37.28
Mediation in experimental and nonexperimental studies: new procedures and recommendations. Psychol Methods (2002) 19.79
Mediation analysis. Annu Rev Psychol (2007) 15.45
Identifiability and exchangeability for direct and indirect effects. Epidemiology (1992) 14.88
Variations in the care of HIV-infected adults in the United States: results from the HIV Cost and Services Utilization Study. JAMA (1999) 10.93
Retention in care: a challenge to survival with HIV infection. Clin Infect Dis (2007) 10.66
Fallibility in estimating direct effects. Int J Epidemiol (2002) 8.34
Treatment for adult HIV infection: 2006 recommendations of the International AIDS Society-USA panel. JAMA (2006) 7.49
Efficacy of a brief case management intervention to link recently diagnosed HIV-infected persons to care. AIDS (2005) 5.43
Highly active antiretroviral therapy in a large urban clinic: risk factors for virologic failure and adverse drug reactions. Ann Intern Med (1999) 5.05
Better physician-patient relationships are associated with higher reported adherence to antiretroviral therapy in patients with HIV infection. J Gen Intern Med (2004) 4.17
Are HIV/AIDS conspiracy beliefs a barrier to HIV prevention among African Americans? J Acquir Immune Defic Syndr (2005) 3.95
Racial and gender disparities in receipt of highly active antiretroviral therapy persist in a multistate sample of HIV patients in 2001. J Acquir Immune Defic Syndr (2005) 3.92
Access to care is the centerpiece in the elimination of socioeconomic disparities in health. Ann Intern Med (1998) 3.90
Distribution of health care expenditures for HIV-infected patients. Clin Infect Dis (2006) 3.72
Access to care, health status, and health disparities in the United States and Canada: results of a cross-national population-based survey. Am J Public Health (2006) 3.66
A further critique of the analytic strategy of adjusting for covariates to identify biologic mediation. Epidemiol Perspect Innov (2004) 3.26
Is the quality of the patient-provider relationship associated with better adherence and health outcomes for patients with HIV? J Gen Intern Med (2006) 3.25
Analysis of mediating variables in prevention and intervention research. NIDA Res Monogr (1994) 2.86
Transforming insurance coverage into quality health care: voltage drops from potential to delivered quality. JAMA (2000) 2.62
Effect of case management on unmet needs and utilization of medical care and medications among HIV-infected persons. Ann Intern Med (2001) 2.51
Failure to establish HIV care: characterizing the "no show" phenomenon. Clin Infect Dis (2007) 2.37
Factors associated with the use of highly active antiretroviral therapy in patients newly entering care in an urban clinic. J Acquir Immune Defic Syndr (2003) 2.33
Exploring lack of trust in care providers and the government as a barrier to health service use. Am J Public Health (2006) 2.30
Predictors of outpatient medical appointment attendance among persons with HIV. AIDS Care (1999) 2.28
Engaging HIV-infected patients in care: their lives depend on it. Clin Infect Dis (2007) 2.26
One-year adherence to clinic visits after highly active antiretroviral therapy: a predictor of clinical progress in HIV patients. J Intern Med (2007) 2.19
Medically eligible women who do not use HAART: the importance of abuse, drug use, and race. Am J Public Health (2004) 2.18
Health disparities--less talk, more action. N Engl J Med (2005) 2.17
Improving health care quality for racial/ethnic minorities: a systematic review of the best evidence regarding provider and organization interventions. BMC Public Health (2006) 2.15
Effect of race and/or ethnicity in use of antiretrovirals and prophylaxis for opportunistic infection: a review of the literature. Public Health Rep (2002) 2.14
Mediational analysis in HIV/AIDS research: estimating multivariate path analytic models in a structural equation modeling framework. AIDS Behav (2007) 1.92
Making the connection: the importance of engagement and retention in HIV medical care. AIDS Patient Care STDS (2007) 1.90
Optimizing the care of minority patients with HIV/AIDS. Clin Infect Dis (2004) 1.88
Patient compliance and medical research: issues in methodology. J Gen Intern Med (1994) 1.76
The influence of psychosocial characteristics and race/ethnicity on the use, duration, and success of antiretroviral therapy. J Acquir Immune Defic Syndr (2008) 1.72
Predictors of antiretroviral treatment failure in an urban HIV clinic. J Acquir Immune Defic Syndr (2007) 1.61
Compliance with public sector HIV medical care. J Natl Med Assoc (1995) 1.49
Sociodemographic characteristics associated with medical appointment adherence among HIV-seropositive patients seeking treatment in a county outpatient facility. Prev Med (2001) 1.48
Eliminating racial and ethnic disparities in health care: what is the role of academic medicine? Acad Med (2006) 1.45
Health disparities and access to health. JAMA (2007) 1.43
Association of medical insurance and other factors with receipt of antiretroviral therapy. Am J Public Health (2002) 1.41
Highly active antiretroviral therapy outcomes in a primary care clinic. AIDS Care (2003) 1.35
Nucleoside reverse-transcriptase inhibitor dosing errors in an outpatient HIV clinic in the electronic medical record era. Clin Infect Dis (2007) 1.26
Access to and utilization of primary care services among HIV-infected women. J Acquir Immune Defic Syndr (1999) 1.19
Which policy to ADAP-T: waiting lists or waiting lines? Clin Infect Dis (2006) 1.16
Human immunodeficiency virus 1 protease inhibitors in clinical practice: predictors of virological outcome. Arch Intern Med (1999) 1.13
Background for the studies on ancillary services and primary care use. AIDS Care (2002) 1.05
Inflammation and triglycerides partially mediate the effect of prepregnancy body mass index on the risk of preeclampsia. Am J Epidemiol (2005) 1.03
HIV care at a crossroads: the emerging crisis in the US HIV epidemic. MedGenMed (2007) 0.99
Antibody neutralization and escape by HIV-1. Nature (2003) 21.48
Effect of early versus deferred antiretroviral therapy for HIV on survival. N Engl J Med (2009) 19.90
Rapid scale-up of antiretroviral therapy at primary care sites in Zambia: feasibility and early outcomes. JAMA (2006) 17.93
A controlled trial of arthroscopic surgery for osteoarthritis of the knee. N Engl J Med (2002) 16.75
Identification and characterization of transmitted and early founder virus envelopes in primary HIV-1 infection. Proc Natl Acad Sci U S A (2008) 16.54
Timing of initiation of antiretroviral therapy in AIDS-free HIV-1-infected patients: a collaborative analysis of 18 HIV cohort studies. Lancet (2009) 14.01
Emergence of resistant human immunodeficiency virus type 1 in patients receiving fusion inhibitor (T-20) monotherapy. Antimicrob Agents Chemother (2002) 13.91
American College of Rheumatology 2008 recommendations for the use of nonbiologic and biologic disease-modifying antirheumatic drugs in rheumatoid arthritis. Arthritis Rheum (2008) 9.94
Overadjustment bias and unnecessary adjustment in epidemiologic studies. Epidemiology (2009) 9.00
Treatment for adult HIV infection: 2006 recommendations of the International AIDS Society-USA panel. JAMA (2006) 7.49
Genetic identity, biological phenotype, and evolutionary pathways of transmitted/founder viruses in acute and early HIV-1 infection. J Exp Med (2009) 7.01
Antiretroviral therapy and the prevalence and incidence of diabetes mellitus in the multicenter AIDS cohort study. Arch Intern Med (2005) 6.02
Identification of 23 new prostate cancer susceptibility loci using the iCOGS custom genotyping array. Nat Genet (2013) 5.58
Antiretroviral treatment for adult HIV infection in 2002: updated recommendations of the International AIDS Society-USA Panel. JAMA (2002) 5.56
Accessing antiretroviral therapy following release from prison. JAMA (2009) 5.45
Incidence and risk factors for immune reconstitution inflammatory syndrome during highly active antiretroviral therapy. AIDS (2005) 5.08
Missed visits and mortality among patients establishing initial outpatient HIV treatment. Clin Infect Dis (2009) 4.96
Efficacy of short-term monotherapy with maraviroc, a new CCR5 antagonist, in patients infected with HIV-1. Nat Med (2005) 4.83
Competing risk regression models for epidemiologic data. Am J Epidemiol (2009) 4.75
Antigenic conservation and immunogenicity of the HIV coreceptor binding site. J Exp Med (2005) 4.68
Culturally appropriate storytelling to improve blood pressure: a randomized trial. Ann Intern Med (2011) 4.24
Hospital use and survival among Veterans Affairs beneficiaries. N Engl J Med (2003) 4.13
Racial and ethnic disparities in the use of health services: bias, preferences, or poor communication? J Gen Intern Med (2003) 4.11
Impact of HIV infection and HAART on serum lipids in men. JAMA (2003) 4.01
Design and methods of the Chronic Kidney Disease in Children (CKiD) prospective cohort study. Clin J Am Soc Nephrol (2006) 3.84
The therapeutic implications of timely linkage and early retention in HIV care. AIDS Patient Care STDS (2009) 3.78
Use of multiple imputation in the epidemiologic literature. Am J Epidemiol (2008) 3.76
A meta-analysis of the incidence of non-AIDS cancers in HIV-infected individuals. J Acquir Immune Defic Syndr (2009) 3.76
Treatment for adult HIV infection: 2004 recommendations of the International AIDS Society-USA Panel. JAMA (2004) 3.74
Late presentation for human immunodeficiency virus care in the United States and Canada. Clin Infect Dis (2010) 3.72
Distribution of health care expenditures for HIV-infected patients. Clin Infect Dis (2006) 3.72
High Multiplicity Infection by HIV-1 in Men Who Have Sex with Men. PLoS Pathog (2010) 3.68
Determinants of human immunodeficiency virus type 1 escape from the primary CD8+ cytotoxic T lymphocyte response. J Exp Med (2004) 3.48
Cohort profile: the North American AIDS Cohort Collaboration on Research and Design (NA-ACCORD). Int J Epidemiol (2007) 3.46
Risk of serious bacterial infections among rheumatoid arthritis patients exposed to tumor necrosis factor alpha antagonists. Arthritis Rheum (2007) 3.38
Disparities in use of a personal health record in a managed care organization. J Am Med Inform Assoc (2009) 3.26
Incidence and clearance of oral human papillomavirus infection in men: the HIM cohort study. Lancet (2013) 3.25
Cohort profile: the Centers for AIDS Research Network of Integrated Clinical Systems. Int J Epidemiol (2008) 3.14
Seven prostate cancer susceptibility loci identified by a multi-stage genome-wide association study. Nat Genet (2011) 3.07
Structural accelerated failure time models for survival analysis in studies with time-varying treatments. Pharmacoepidemiol Drug Saf (2005) 3.05
Intrinsic breast tumor subtypes, race, and long-term survival in the Carolina Breast Cancer Study. Clin Cancer Res (2010) 3.04
From access to engagement: measuring retention in outpatient HIV clinical care. AIDS Patient Care STDS (2010) 3.03
Long-term risk of mortality and end-stage renal disease among the elderly after small increases in serum creatinine level during hospitalization for acute myocardial infarction. Arch Intern Med (2008) 2.99
Patient complexity: more than comorbidity. the vector model of complexity. J Gen Intern Med (2007) 2.91
The safety, plasma pharmacokinetics, and antiviral activity of subcutaneous enfuvirtide (T-20), a peptide inhibitor of gp41-mediated virus fusion, in HIV-infected adults. AIDS Res Hum Retroviruses (2002) 2.89
Expression profiling of purified normal human luminal and myoepithelial breast cells: identification of novel prognostic markers for breast cancer. Cancer Res (2004) 2.82
Chemoprevention of nonmelanoma skin cancer with celecoxib: a randomized, double-blind, placebo-controlled trial. J Natl Cancer Inst (2010) 2.80
Invasive cervical cancer risk among HIV-infected women: a North American multicohort collaboration prospective study. J Acquir Immune Defic Syndr (2013) 2.78
Early retention in HIV care and viral load suppression: implications for a test and treat approach to HIV prevention. J Acquir Immune Defic Syndr (2012) 2.74
Crohn's disease and the NOD2 gene: a role for paneth cells. Gastroenterology (2003) 2.72
Wide variation in the multiplicity of HIV-1 infection among injection drug users. J Virol (2010) 2.67
Lower pill burden and once-daily antiretroviral treatment regimens for HIV infection: A meta-analysis of randomized controlled trials. Clin Infect Dis (2014) 2.65
Surprisingly high prevalence of anxiety and depression in chronic breathing disorders. Chest (2005) 2.59
Health care system and policy factors influencing engagement in HIV medical care: piecing together the fragments of a fractured health care delivery system. Clin Infect Dis (2011) 2.57
Cell phones for ecological momentary assessment with cocaine-addicted homeless patients in treatment. J Subst Abuse Treat (2006) 2.57
Risk of anal cancer in HIV-infected and HIV-uninfected individuals in North America. Clin Infect Dis (2012) 2.50
Comparison of a brush-sampling fecal immunochemical test for hemoglobin with a sensitive guaiac-based fecal occult blood test in detection of colorectal neoplasia. Cancer (2006) 2.47
Measuring retention in HIV care: the elusive gold standard. J Acquir Immune Defic Syndr (2012) 2.47
Development of a quality-of-life questionnaire for adults with strabismus. Ophthalmology (2008) 2.46
Bivariate meta-analysis of sensitivity and specificity with sparse data: a generalized linear mixed model approach. J Clin Epidemiol (2006) 2.45
Trends in AIDS-defining and non-AIDS-defining malignancies among HIV-infected patients: 1989-2002. Clin Infect Dis (2004) 2.42
Beyond joint implant registries: a patient-centered research consortium for comparative effectiveness in total joint replacement. JAMA (2012) 2.37
Failure to establish HIV care: characterizing the "no show" phenomenon. Clin Infect Dis (2007) 2.37
Users of Internet health information: differences by health status. J Med Internet Res (2003) 2.35
Invited commentary: positivity in practice. Am J Epidemiol (2010) 2.33
Modeling sequence evolution in acute HIV-1 infection. J Theor Biol (2009) 2.32
Clinical outcome of HIV-infected antiretroviral-naive patients with discordant immunologic and virologic responses to highly active antiretroviral therapy. J Acquir Immune Defic Syndr (2008) 2.29
Postnatal HIV-1 transmission after cessation of infant extended antiretroviral prophylaxis and effect of maternal highly active antiretroviral therapy. J Infect Dis (2009) 2.26
Adherence to first-line antiretroviral therapy affects non-virologic outcomes among patients on treatment for more than 12 months in Lusaka, Zambia. Int J Epidemiol (2009) 2.25
Administrative codes combined with medical records based criteria accurately identified bacterial infections among rheumatoid arthritis patients. J Clin Epidemiol (2008) 2.25
Impact of race on health care utilization and outcomes in veterans with congestive heart failure. J Am Coll Cardiol (2004) 2.21
Baseline renal insufficiency and risk of death among HIV-infected adults on antiretroviral therapy in Lusaka, Zambia. AIDS (2008) 2.21
Increased regimen durability in the era of once-daily fixed-dose combination antiretroviral therapy. AIDS (2008) 2.13
Antiretroviral therapy exposure and incidence of diabetes mellitus in the Women's Interagency HIV Study. AIDS (2007) 2.10
Survival advantage of black patients with kidney disease after acute myocardial infarction. Clin J Am Soc Nephrol (2006) 2.08
Missing doses in the life span study of Japanese atomic bomb survivors. Am J Epidemiol (2013) 2.08
Pharmaceuticals companies' medication assistance programs: potentially useful but too burdensome to use? South Med J (2009) 2.08
Can routine clinical markers be used longitudinally to monitor antiretroviral therapy success in resource-limited settings? Clin Infect Dis (2006) 2.07