1. Epidemiology Research Center, Marshfield Clinic Research Foundation, Marshfield, Wisconsin.
2. Department of Education, Minneapolis Heart Institute Foundation, Minneapolis, Minnesota.
3. Center for Healthcare Innovation, Allina Hospitals and Clinics, Minneapolis, Minnesota.
4. Division of Epidemiology & Community Health, University of Minnesota, Minneapolis, Minnesota.
5. New Ulm Medical Center, Allina Hospitals and Clinics, Minneapolis, Minnesota.
6. Minneapolis Heart Institute, Allina Hospitals and Clinics, Minneapolis, Minnesota.