1. Ruthanne Marcus is with the AIDS Program, Section of Infectious Diseases, Yale University School of Medicine, New Haven, CT. Alexander de Groot is with the Biostatistics and Epidemiology Data Analytics Center and Howard Cabral is with the Department of Biostatistics, Boston University School of Public Health, Boston, MA. Sara Bachman and Serena Rajabiun are with the Boston University School of Social Work, Boston. Serena Rajabiun is also a Guest Editor for this supplement issue. Nicole Chisolm is with...