1. Division of Cardiology, Department of Internal Medicine, Peking University First Hospital, Beijing 100034, P.R. China
2. Department of Cardiovascular Diseases, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
3. Department of Dermatology, Dongfeng General Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
4. Division of Cardiology, Department of Internal Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China