1. Graduate School, Beijing University of Chinese Medicine, Beijing, China
2. Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China
3. Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
4. National Clinical Research Center for Respiratory Diseases, Beijing, China
5. Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China
6. Clinical Diagnosis Department of Respiratory Diseases Center, China-Japan Friendship Hospital, Beijing, China
7. International Medical Services, China–Japan Friendship Hospital, Beijing, China