Department of Respiratory Medicine, Shenzhen Children's Hospital, Shenzhen, Guangdong, China;
Department of Respiration, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China;
Department of Pulmonology, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China;
Department of Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health,Beijing, China;
Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China;
Department of Respiration, Jiangxi Provincial Children's Hospital, Nanchang, Jiangxi, China;
Department of Respiration, Children's Hospital Affiliated to Chongqing Medical University, Chongqing, China;
Department of Infectious Disease, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China;
Department of Pediatrics, Guilin People's Hospital, Guilin, Guangxi, China;
Department of Pediatrics, Liuzhou General Hospital, Liuzhou, Guangxi, China;
Department of Respiration, Changchun Children's Hospital, Changchun, Jilin, China;
Department of Respiratory Medicine, Shenzhen Children's Hospital, Shenzhen, Guangdong, China;
Department of Respiration, Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong, China;
Department of Respiration, Children's Hospital of Shanghai Jiaotong University, Shanghai, China;
Department of Respiratory Medicine, Shenzhen Children's Hospital, Shenzhen, Guangdong, China;
Department of Pulmonology, Children's Hospital Affiliated to Capital Institute of Pediatrics, Beijing, China;
Department of Respiratory Medicine, Shenzhen Children's Hospital, Shenzhen, Guangdong, China;
Department of Pulmonology, Children's Hospital Affiliated to Capital Institute of Pediatrics, Beijing, China;
Department of Respiration, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu, China;
Department of Respiration, Children's Hospital of Soochow University, Suzhou, Jiangsu, China;
Department of Pediatric Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China;