1. Department of Cardiothoracic Surgery, Suining Central Hospital, Suining, Sichuan, China;
2. Department of Pathology, Suining Central Hospital, Suining, Sichuan, China;
3. Department of Radiology, Suining Central Hospital, Suining, Sichuan, China;
4. Department of Intensive Care Unit, Suining Central Hospital, Suining, Sichuan, China