1 Division of Internal Medicine, Department of Medicine, Northshore University HealthSystem, Evanston, Ill.
2 Division of Internal Medicine, Department of Medicine, John H. Stroger Jr Hospital of Cook County, Chicago, Ill.
3 Division of Vascular Medicine, Department of Medicine, Northshore University HealthSystem, Evanston, Ill; University of Chicago Medical Center, Chicago, Ill.
4 Northshore University Healthsystem-Emeritus, Senior Clinician Educator, University of Chicago Pritzker School of Medicine, Chicago, Ill.