1. Beijing Key Laboratory of Respiratory and Pulmonary Circulation; Beijing Institute of Respiratory Medicine; Beijing Chao-Yang Hospital; Capital Medical University; Beijing China
2. Beijing Hospital; Ministry of Health; Beijing China
3. The Affiliated Hospital of Medical College of Qingdao; Shandong China
4. Sir Run Run Shaw Hospital; Affiliated with Zhejiang University; Zhejiang China
5. Peking Union Medical College Hospital; Chinese Academy of Medical Sciences; Beijing China
6. The Affiliated Hospital of Dalian Medical University; Liaoning China
7. Beijing Fuwai Hospital; Chinese Academy of Medical Sciences; Beijing China
8. Baylor College of Medicine; Houston TX USA
9. University of Washington School of Medicine; Seattle WA USA