1. a Division of Treatment and Care, National Center for AIDS/STD Control and Prevention , Chinese Center for Disease Control and Prevention , 27 Nanwei Road, Xuan Wu District , Beijing , 100050 , China
2. b Provincial Infectious Disease Hospital , Henan , China
3. c Provincial Center for Disease Control and Prevention , Guangxi , China
4. d Provincial Center for Disease Control and Prevention , Hubei , China
5. e Provincial Center for Disease Control and Prevention , Anhui , China
6. f Provincial Center for Disease Control and Prevention , Shanxi , China
7. g Provincial Center for AIDS Care , Yunnan , China
8. h Provincial Center for Disease Control and Prevention , HeBei , China
9. i Beijing Ditan Hospital , Beijing , China