1. Hebei Medical University, China; National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, China
2. National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, China; Yangzhou Center for Disease Control and Prevention, China
3. National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, China
4. Hebei Medical University, China
5. Hebei Medical University Fourth Affiliated Hospital, China