1. Department of Clinical Laboratory Medicine, Hebei Medical University, Shijiazhuang, China.
2. Department of Laboratory medicine, the Fifth Hospital of Shijiazhuang, Hebei Medicine University, Shijiazhuang, China.
3. Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China.
4. Department of Dermatology and Venereal Disease, Handan infectious Disease Hospital, Handan, China.