1. Department of StomatologyBeijing Chao‐Yang HospitalCapital Medical University Beijing China
2. Guangdong Mental Health CenterGuangdong Provincial People's HospitalGuangdong Academy of Medical Sciences Guangzhou Guangdong China
3. Project and Data Management OfficeInstitute of Clinical Medical SciencesChina‐Japan Friendship Hospital Beijing China
4. Department of EpidemiologyRichard M. Fairbanks School of Public HealthIndiana University Indianapolis Indiana
5. Department of Immunology and Infectious DiseasesThe Forsyth Institute Cambridge Massachusetts
6. Department of Oral Medicine, Infection and ImmunityHarvard School of Dental Medicine Boston Massachusetts
7. School of StomatologyShanxi Medical University Taiyuan Shanxi Province China
8. Department of Pulmonary and Critical Care MedicineBeijing Chao‐Yang HospitalCapital Medical University Beijing China
9. Beijing Institute of Respiratory Medicine Beijing China
10. Department of Pulmonary and Critical Care MedicineCenter of Respiratory MedicineChina‐Japan Friendship Hospital Beijing China
11. National Clinical Research Center for Respiratory Diseases Beijing China
12. Department of Respiratory MedicineCapital Medical University Beijing China
13. Institute of Clinical Medical SciencesCenter of Respiratory MedicineChina‐Japan Friendship Hospital Beijing China
14. Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
15. WHO Collaborating Center for Tobacco Cessation and Respiratory Diseases Prevention Beijing China