1. Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China
2. Department of Respiratory Medicine, Shanghai General Hospital, Shanghai, China
3. Department of Respiratory Medicine, Xinqiao Hospital, Third Military Medical University, Chongqing, China
4. Department of Respiratory Medicine, West China Hospital, West China School of Medicine, Chengdu, China
5. Department of Respiratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
6. Department of Respiratory Medicine, Jiangsu Province Hospital, Nanjing, China