1. Department of Cardiology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
2. Department of General Practice, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200336, P.R. China
3. Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200336, P.R. China