1. University of Pennsylvania School of Medicine, Philadelphia, PA, USA,
2. University of Minnesota School of Nursing, Minneapolis, MN, USA
3. University of Pennsylvania School of Medicine, Philadelphia, PA, USA
4. Department of Family and Preventive Medicine, University of California, San Diego, School of Medicine, San Diego, CA, USA
5. Section of Vascular Medicine, University of Colorado Health Sciences Center, Denver, CO, USA
6. Division of Epidemiology, University of Minnesota School of Public Health, and Vascular Medicine Program, Minneapolis Heart Institute, Minneapolis, MN, USA