1. Division of Pulmonary and Critical Care Medicine, The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts2Center of Implementation and Improvement Sciences, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts
2. Data Coordinating Center, Boston University School of Public Health, Boston, Massachusetts
3. Section of Cardiac Pacing and Electrophysiology, Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester
4. Section of Cardiovascular Medicine, Boston University School of Medicine, Boston, Massachusetts6Section of Preventive Medicine, Boston University School of Medicine, Boston, Massachusetts7Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts