1. School of Medical Humanities, Capital Medical University , No. 10, Xitoutiao, You An Men Wai, Fengtai District, Beijing 100069, China
2. Outpatient Office, Beijing Luhe Hospital, Capital Medical University , No. 82, Xinhua South Street, Tongzhou District, Beijing 101100, China
3. Ethics Committee Office, Beijing Ditan Hospital, Capital Medical University , No. 8 Jingshun East Street, Chaoyang District, Beijing 100015, China
4. Cardiac Surgery Department, People’s Hospital of Beijing Daxing District , No. 26, Huangcun West Street, Daxing District, Beijing 102600, China
5. Department of Medical Administration, Fengtai District Xiluoyuan Community Health Service Center , Building 26, Xiluoyuan 1, Fengtai District, Beijing 100077, China
6. Dean’s office, Huairou District Liulimiao Community Health Service Center , No. 17, Liulimiao Village, Liulimiao Town, Huairou District, Beijing 101400, China