[1] Shandong Univ, Inst Epidemiol & Hlth Stat, Sch Publ Hlth, Jinan 250100, Peoples R China
[2] Chongqing Municipal Ctr Dis Control & Prevent, Inst AIDS Prevent & Control, Chongqing, Peoples R China
[3] Beijing Municipal Ctr Dis Control & Prevent, Inst AIDS Prevent & Control, Beijing, Peoples R China
[4] Chinese Ctr Dis Control & Prevent, State Key Lab Infect Dis Prevent & Control, Natl Ctr AIDS STD Control & Prevent, Beijing, Peoples R China
[5] San Francisco Dept Publ Hlth, San Francisco, CA USA
[6] Vanderbilt Univ, Sch Med, Inst Global Hlth, Nashville, TN 37212 USA
[7] Vanderbilt Univ, Sch Med, Dept Pediat, Nashville, TN 37212 USA