1. Department of Pulmonary and Critical Care Medicine, Shanghai Institute of Respiratory Disease, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
2. Department of Respiration, Jiading Central Hospital, Shanghai 201800, P.R. China
3. Department of Microbiology and Parasitology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China