[1] Univ North Carolina Chapel Hill Project China, Guangzhou, Peoples R China
[2] Univ Calif Los Angeles, Sch Med, Div Infect Dis, LOS ANGELES, CA USA
[3] Zhitong Guangzhou LGBT Ctr, Guangzhou, Peoples R China
[4] Natl Univ Singapore, Saw Swee Hock Sch Publ Hlth, Singapore, Singapore
[5] Univ North Carolina Chapel Hill, Dept Med, Div Infect Dis, Chapel Hill, NC 27599 USA
[6] Cincinnati Childrens Hosp Med Ctr, Anderson Ctr Hlth Syst Excellence, Cincinnati, OH 45229 USA
[7] Nanjing Med Univ, Sch Publ Hlth, Dept Social Med & Hlth Educ, 101 Longmian Ave, Nanjing 211166, Peoples R China