1. Department of Anesthesiology, Jin Yin-tan Hospital, Wuhan, Hubei, China
2. Department of Surgery, Wuhan Institute for Tuberculosis Control, Wuhan, Hubei, China
3. Outpatient Department, Langli Aesthetic Surgery Clinic, Xi’an, Shanxi, China
4. Department of Endoscopy, The Second People’s Hospital of Shanxi Province, Xi’an, Shanxi, China