Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, ChinaRegional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, ChinaDepartment of Respiratory Diseases, Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China