1. Department of Cardiology, Division of Cardiology and Cardiovascular Surgery, 6th Medical Center of PLA General Hospital, Beijing, China
2. Department of Cardiology, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing, China
3. Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
4. Department of Cardiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
5. Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China