1. Department of Cardiovascular Medicine, Second Xiangya Hospital (F.T., H.H., Q.L., S.Z., Y.X.), Central South University, Changsha, China.
2. Xiangya School of Medicine (F.T., H.H.), Central South University, Changsha, China.
3. Division of Cardiovascular Medicine, Department of Medicine (S.F.), University of Louisville, KY.
4. Department of Anesthesiology and Perioperative Medicine (J.H.), University of Louisville, KY.