1. Department of Respiratory and Critical Care Medicine, West China Hospital, West China School of Medicine, and Division of Pulmonary Diseases, State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan, China
2. Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, China
3. Key Laboratory of Obstetrics and Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
4. Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
5. Department of Respiratory Medicine, Hospital of Chengdu office of People’s Government of Tibetan Autonomous Region of China, Chengdu, Sichuan, China