1. Department of Cardiology Surgery, Qinghai Province Cardiovascular and Cerebrovascular Disease Specialist Hospital, Xining, Qinghai 810012, China
2. Department of Cardiology Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100000, China
3. Cardiovascular Center of Gansu Provincial Maternity and Child-care Hospital, Lanzhou, Gansu 730000, China
4. Department of Cardiology Surgery, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China
5. Department of Intensive Care Unit, Qinghai Province Cardiovascular and Cerebrovascular Disease Specialist Hospital, Xining, Qinghai 810012, China