1. Department of Infectious Diseases; Zhejiang Provincial Center for Disease Control and Prevention; Hangzhou 310051 China
2. Department of Infectious Disease Control and Prevention; Shanghai Municipal Center for Disease Control and Prevention; Shanghai 200336 China
3. Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences; Peking University Health Science Center; Beijing 100091 China
4. Department of Zoology, Faculty of Science; Kafr El Sheikh University; Kafr El Sheikh 33516 Egypt
5. Research Center for Humanities and Social Sciences; Academia Sinica; Taipei Taiwan
6. Department of Infectious Diseases; Ningxia Provincial Center for Disease Control and Prevention; Yinchuan 750004 China
7. Department of Infectious Diseases; Hubei Provincial Center for Disease Control and Prevention; Wuhan 430079 China
8. Department of Infectious Diseases; Hunan Provincial Center for Disease Control and Prevention; Changsha 410005 China