1. Department of Cardiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou, China
2. Shantou University Medical College, Shantou, China
3. Department of Endocrinology, The Second Affiliated Hospital of Shantou University Medical College, Shantou, China
4. Cardiac Arrhythmia Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
5. Department of Cardiology, Kailuan General Hospital, Tangshan, China