1. Cardiology Division, Department of Medicine (C.-C.F.T., S.L., A.W., A.Y., M.S., Y.-M.L., C.C., H.-F.T., C.-W.S.), Queen Mary Hospital, the University of Hong Kong, Hong Kong SAR, China.
2. Department of Accident and Emergency Department (K.-S.C., T.-C.T., M.T.), Queen Mary Hospital, the University of Hong Kong, Hong Kong SAR, China.