1. College of Pharmaceutical Sciences, Capital Medical University, Beijing 100069
2. State Key Laboratory for Infection
Disease Prevention and Control, National Center for AIDS/STD Control
and Prevention (NCAIDS), Chinese Center for Disease Control and Prevention, Beijing 102206
3. MOE/MOH Key Laboratory of Medical
Molecular Virology, Shanghai Medical College and Institute of Medical
Microbiology, Fudan University, Shanghai
200032, China