1 Department of Cardiovascular Anesthesiology, The First Hospital of Lanzhou University, Lanzhou, 730000, China.
2 The First School of Clinical Medicine Lanzhou University, Lanzhou, 730000, China.
3 Department of Cardiovascular Anesthesiology, The First Hospital of Lanzhou University, Lanzhou, 730000, China. Electronic address: renxudong_m1370@163.com.