1 School of Public Health, China Medical University, Shenyang, China; Institute of AIDS/STD Prevention and Control, Beijing Center for Disease Prevention and Control, Beijing, China.
2 National Institutes for Food and Drug Control, Beijing, China.
3 Institute of AIDS/STD Prevention and Control, Beijing Center for Disease Prevention and Control, Beijing, China.
4 Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China.
5 Beijing Chaoyang District Centre for Disease Prevention and Control, Beijing, China.
6 Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing, China.
7 Clinic of Center for Infection, Beijing Youan Hospital, Capital Medical University, Beijing, China. Electronic address: [email protected].
8 Institute of AIDS/STD Prevention and Control, Beijing Center for Disease Prevention and Control, Beijing, China. Electronic address: [email protected].