1. Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore2Department of Hospital Epidemiology, Veterans Affairs Maryland Health Care System, Baltimore3Center for Disease Dynamics, Economics, and Policy (CDDEP), Washington, DC
2. Robert Wood Johnson Foundation Clinical Scholars Program, Yale University School of Medicine, New Haven, Connecticut5Department of Veterans Affairs West Haven, West Haven, Connecticut
3. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
4. Memorial Sloan Kettering Cancer Center, New York, New York