1. Department of Health Sciences Research, Mayo Clinic, Rochester, MN
2. Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN
3. Division of Cardiology, Department of Medicine, University of Missouri at Kansas City, Kansas City, MO
4. College of Nursing, University of Kentucky, Lexington, KY
5. Division of Health Policy and Management, University of Minnesota School of Public Health, Minneapolis, MN