1. Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
2. Department of Cardiology, Wuhan Hospital of Integrated Traditional Chinese and Western Medicine, Wuhan, P.R. China
3. Department of Cardiology, An Zhen Hospital, Capital Medical University, Beijing, P.R. China
4. Texas Cardiac Arrhythmia Institute at St. David’s Medical Center, Austin, TX, USA