1. National Institute for Viral Disease Control and Prevention, China CDC, Beijing, China
2. Key Laboratory for Medical Virology and Viral Diseases, National Health Commission of the People's Republic of China, Beijing, China
3. Shaanxi Provincial Centre for Disease Control and Prevention, Xi’an, China
4. Department of Clinical Microbiology, Xiangtan Central Hospital, Xiangtan, China
5. School of Public Health, Gansu University of Chinese Medicine, Lanzhou, China
6. Yunnan Tropical and Subtropical Animal Viral Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming, China