*Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, United Kingdom
†Social Entrepreneurship for Sexual Health (SESH) Global, Guangzhou, China
‡Central Clinical School, Monash University, Victoria, Australia
§School of Public Health, Shandong University, Jinan, China
‖Eastern Virginia Medical School, Norfolk, VA
¶University of North Carolina at Chapel Hill, Chapel Hill, NC
#Shandong Centre for Disease Control and Prevention, Jinan, China
**School of Medicine, University of California, San Francisco, CA
††Guangdong Provincial Centre for Skin Disease and STI Control, Guangzhou, China
‡‡Dermatology Hospital, Southern Medical University, Guangzhou, China
§§Guangdong Dermatology Hospital, Guangzhou, China
‖‖Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
Supported by the National Institutes of Health (NIAID 1R01AI114310-01), UNC-South China STD Research Training Center (FIC 1D43TW009532-01), UNC Center for AIDS Research (NIAID 5P30AI050410), UCSF Center for AIDS Research (NIAID P30 AI027763), National Institute of Mental Health (R00MH093201), UJMT Fogarty Fellowship (FIC R25TW0093), Australian National Health and Medical Research Council (APP1104781), and SESH Global (www.seshglobal.org). Administrative assistance from the Guangdong Provincial Center for Skin Diseases and STI Control. UNC Chapel Hill and UNC Project-China in Guangzhou, China.
The authors have no conflicts of interest to disclose.
J.D.T., H.L., and C.L. contributed to the conception and design of the study. C.W. and B.Y. provided oversight for data collection, and W.M., D.K., M.L., G.M., L.Y., and S.H. assisted in the data collection. E.L. assisted with the literature search. J.J.O. analyzed the data and drafted the paper. All authors revised the manuscript and approved the final version to be published.
J.J.O. and H.L. are first authors equally.