1. Department of Hospital‑Acquired Infection Control, Suining Central Hospital, Suining, Sichuan 629000, P.R. China
2. Department of Cardiovascular Surgery, Suining Central Hospital, Suining, Sichuan 629000, P.R. China
3. Intensive Care Unit, Suining Central Hospital, Suining, Sichuan 629000, P.R. China
4. Department of Anesthesiology, Suining Central Hospital, Suining, Sichuan 629000, P.R. China
5. Department of Operating Room, Suining Central Hospital, Suining, Sichuan 629000, P.R. China