1. Peking University China‐Japan Friendship School of Clinical MedicineBeijingChina
2. Department of Respiratory and Critical Care MedicineCenter of Respiratory MedicineChina‐Japan Friendship HospitalBeijingChina
3. Institute of Respiratory MedicineChinese Academy of Medical SciencesBeijingChina
4. National Clinical Research Center for Respiratory DiseasesBeijingChina
5. Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina