1. School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
2. Institute of pharmaceutical and medical devices supervision, National Medical Products Administration-Chinese Academy of Medical Sciences, Beijing, China
3. Department of Respiratory and Critical Care Medicine, Affiliated Hospital of Guilin Medical University, Guilin, China
4. Division of Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing, China
5. Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China