1 Department of Infectious Diseases and Laboratory of Infectious Diseases, Wenzhou Central Hospital, The Dingli Clinical College of Wenzhou Medical University, Wenzhou, China.
2 Department of Health Policy and Community Health, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA, USA.
3 Department of Rural Health, Oklahoma State University Center for Health Sciences, Tulsa, OK 74135, USA. Electronic address: wenjie.sun@okstate.edu.