1. Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
2. Department of Laboratory Medicine & Blood Transfusion, the 907th Hospital, Fujian, Nanping, China
3. Northwest Institute of Plateau Biology, Chinese Academy of Science, Qinghai, Xining, China
4. Central Laboratory of the sixth medical center of PLA general hospital, Beijing, China
5. State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China