1. Department of Epidemiology; University of North Carolina at Chapel Hill School of Global Public Health; Chapel Hill North Carolina USA
2. Cardiovascular Institute and Fuwai Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College, and Chinese National Center for Cardiovascular Disease Control and Research; Beijing China
3. Department of Epidemiology; University of Texas School of Public Health; Houston Texas USA
4. Division of Biostatistics; Washington University School of Medicine; St. Louis Missouri USA
5. Division of Prevention and Population Sciences; National Heart, Lung, Blood Institute; Bethesda Maryland USA
6. National Laboratory of Medical Molecular Biology; Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
7. Department of Epidemiology, Tulane University Department of Medicine and School of Public Health and Tropical Medicine; Tulane University School of Medicine; New Orleans Louisiana USA