1. Division of Cardiology Johns Hopkins University School of Medicine Baltimore MD USA
2. Welch Center for Clinical Research and Prevention Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
3. Bridgeport Hospital Bridgeport CT USA
4. Division of Geriatric Medicine and Gerontology Johns Hopkins University School of Medicine Baltimore MD USA
5. Division of Pulmonary and Critical Care, Department of Medicine Johns Hopkins University School of Medicine Baltimore MD USA
6. Department of Epidemiology, Gillings School of Public Health University of North Carolina Chapel Hill NC USA
7. Program in Public Health Stony Brook University Stony Brook NY USA