[1] Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, 130 Mason Farm Road, Chapel Hill
[2] Department of Social Medicine, University of North Carolina at Chapel Hill, 333 South Columbia Street, Chapel Hill
[3] Center for Bioethics, University of North Carolina at Chapel Hill, 333 South Columbia Street, Chapel Hill
[4] Zhitong Guangzhou LGBT Center, Guangdong Provincial Dermatology Hospital, Lujing Road, Luhu Park, Yuexiu, Guangzhou, Guangdong
[5] School of Medicine, University of North Carolina at Chapel Hill, 321 South Columbia Street, Chapel Hill
[6] Faculty of Infectious Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London