University of North Carolina (UNC) at Chapel Hill - Department of Epidemiology, affiliation not provided to SSRN, University of North Carolina (UNC) at Chapel Hill, Duke University, affiliation not provided to SSRN, affiliation not provided to SSRN and University of North Carolina (UNC) at Chapel Hill

University of North Carolina (UNC) at Chapel Hill - Department of Health Behavior, Hanoi Medical University, Vietnam Authority for HIV/AIDS Control, University of North Carolina (UNC) at Chapel Hill, Washington University in St. Louis, University of North Carolina (UNC) at Chapel Hill, University of North Carolina (UNC) at Chapel Hill, University of North Carolina (UNC) at Chapel Hill, University of North Carolina (UNC) at Chapel Hill, University of North Carolina (UNC) at Chapel Hill, Vietnam Authority for HIV/AIDS Control, Vietnam Authority for HIV/AIDS Control, University of North Carolina (UNC) at Chapel Hill, Hanoi Medical University, University of North Carolina (UNC) at Chapel Hill, University of North Carolina (UNC) at Chapel Hill, University of North Carolina (UNC) at Chapel Hill, Johns Hopkins University, Seoul National University, University of North Carolina (UNC) at Chapel Hill and University of North Carolina (UNC) at Chapel Hill