[1] China-Japan Friendship Hospital,Department of Tobacco Control and Prevention of Respiratory Diseases, Center of Respiratory Medicine
[2] WHO Collaborating Center for Tobacco Cessation and Respiratory Diseases Prevention,Institute of Respiratory Medicine
[3] National Clinical Research Center for Respiratory Diseases,School of Health Policy and Management
[4] Chinese Academy of Medical Sciences,undefined
[5] National Center for Respiratory Medicine,undefined
[6] Peking Union Medical College,undefined
[7] Chinese Academy of Medical Sciences,undefined
[8] Chinese Academy of Medical Sciences and Peking Union Medical College,undefined
[9] Capital Medical University China-Japan Friendship School of Clinical Medicine,undefined