1Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
2Center for Cardiovascular Disease Prevention, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
3Donald W. Reynolds Center for Cardiovascular Research, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
4Department of Epidemiology, Harvard School of Public Health, Boston, MA
Correspondence to: Shumin M. Zhang, MD, ScD, Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, 900 Commonwealth Ave East, Boston, MA 02215 (e-mail: [email protected]).
