1. Taihe Hospital, Hubei Medical University, Shiyan, Hubei Province 442000, China.
2. Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing 100071, China
3. Qinghai Institute for Endemic Diseases Prevention and Control, Xining, Qinghai Province 811602, China.