1. Department of Respiratory and Critical Care Medicine; Beijing Chaoyang Hospital; Capital Medical University; Beijing Key Laboratory of Respiratory and Pulmonary Circulation; Beijing Institute of Respiratory Medicine; Beijing China
2. Department of Surgery Intensive Care Unit; State Key Laboratory of Cardiovascular Diseases; Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
3. Department of Surgery Intensive Care Unit; Beijing Anzhen Hospital; Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Disease; Beijing China
4. Department of Respiratory Medicine; China-Japan Friendship Hospital, Capital Medical University; National Clinical Research Center for Respiratory Medicine; Beijing China