1. Hebei University of Engineering, Affiliated Hospital, College of Medicine, Handan, Hebei 056002, P.R. China
2. State Key Laboratory of Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, P.R. China
3. Beijing Huawei Tongke Medical Research Center, Beijing 100069, P.R. China