1. 1State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, No. 20 Dongda Street, Fengtai District, Beijing 100071, People's Republic of China
2. 2Chinese Academy of Inspection and Quarantine, Institute of Health Quarantine, No. A3, Gaobeidian Bei Lu, Chaoyang District, Beijing 100123, People's Republic of China