1. Department of Internal Medicine; Division of Cardiovascular Medicine, University of Michigan; Ann Arbor Michigan
2. Detroit Medical Center-Cardiovascular Institute; Detroit Michigan
3. Division of Cardiology; Henry Ford Health System; Detroit Michigan
4. McLaren-Northern Michigan Regional Hospital; Petoskey Michigan
5. Department of Cardiovascular Medicine; St. John Hospital and Medical Center; Detroit Michigan
6. Cardiovascular Medicine, VA Ann Arbor Healthcare System; Ann Arbor Michigan