1. From the Cardiology Division, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China (Y-HC, K-KL, K-HY, H-TC, C-PL, and H-FT); the Department of Medicine, Tung Wah Hospital, Hong Kong, China (S-WL); the Department of Clinical Biochemistry Unit, Queen Mary Hospital, Hong Kong (ST); and the Department of Medicine, Vanderbilt Epidemiology Center and Vanderbilt-Ing