1. Department of Pulmonary and Critical Care Medicine; Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders; Beijing Chao-Yang Hospital; Capital Medical University; Beijing China
2. Beijing Institute of Respiratory Medicine; Beijing China
3. Heart-Lung Function Testing Center, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China