1. Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100020, P.R. China
2. Changchun University of Chinese Medicine, Changchun, Jilin 130117, P.R. China
3. Department of Pain Management, Affiliated Hospital 5 of Nantong University (Taizhou People's Hospital), Taizhou, Jiangsu 225300, P.R. China