1 Thrombosis Research Group, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
2 Department of Internal Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.
3 Department of Medicine, Jamaica Hospital Medical Center, Queens, New York.
4 Respiratory Department, Hospital Ramón y Cajal, and Medicine Department, Universidad de Alcalá (Instituto de Ramón y Cajal de Investigación Sanitaria), Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, Madrid, Spain.
5 Department of Biostatistics, Hospital Ramón y Cajal, and Universidad de Alcalá (IRYCIS), Madrid, Spain.
6 CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.
7 Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
8 Division of General Internal Medicine and Primary Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
9 Department of Medicine, Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
10 Harvard Medical School, Boston, Massachusetts.
11 Division of Cardiology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
12 YNHH/Yale Center for Outcomes Research and Evaluation (CORE), New Haven, Connecticut.
13 Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut.
14 Department of Health Policy and Management, Yale School of Public Health, New Haven, Connecticut.