1 Division of Respiratory Care Department of Cardiopulmonary Sciences Rush University Medical Center Chicago, Illinois Jie_Li@rush.edu.
2 Division of Respiratory Care Department of Cardiopulmonary Sciences Rush University Medical Center Chicago, Illinois.
3 Pulmonary and Critical Care Medicine West China Hospital and West China School of Medicine Sichuan University Chengdu, China.
4 Pulmonary and Critical Care Medicine China-Japan Friendship Hospital National Clinical Research Center for Respiratory Diseases Institute of Respiratory Medicine Chinese Academy of Medical Sciences Beijing, China.