1 Gertrude H Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA; Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA. Electronic address: LK24@columbia.edu.
2 Gertrude H Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA; Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA; HIV Center for Clinical and Behavioral Studies, New York State Psychiatric Institute, New York, NY, USA.
3 Department of Anthropology, Hunter College and the Graduate Center, City University of New York (CUNY), New York, NY, USA.