1. Department of Anesthesiology, Central Laboratory, Tianjin 4th Centre Hospital, The Fourth Central Hospital Affiliated to Nankai University, The Fourth Center Clinical College of Tianjin Medical University, Tianjin 300140, P.R. China
2. Department of Cardiology, Tianjin 4th Centre Hospital, The Fourth Central Hospital Affiliated to Nankai University, Tianjin 300140, P.R. China
3. Department of Pathology, Haiyang Renmin Hospital, Haiyang, Shandong 265100, P.R. China
4. Department of Anesthesiology, Tianjin Central Hospital of Gynecology Obstetrics, Central Gynecology Obstetrics Hospital of Nankai University, Tianjin 300052, P.R. China
5. Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
6. Central Laboratory, Tianjin 4th Centre Hospital, The Fourth Central Hospital Affiliated to Nankai University, Tianjin 300140, P.R. China