1 Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing 100029, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; Department of Respiratory Medicine, Capital Medical University, Beijing, China. Electronic address: email@example.com.
2 Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK.
3 Department of Medicine, University of Virginia School of Medicine, Charlottesville, VA, USA.
4 National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing, China.