1. 1 Sanford Cardiovascular Institute, Sanford Heart Hospital, University of South Dakota Sanford School of Medicine, Sioux Falls, South Dakota
2. 2 Mount Sinai Hospital, Icahn School of Medicine at Mount Sinai, New York, New York
3. 3 Gundersen Health System, La Crosse, Wisconsin
4. 4 Idaho College of Osteopathic Medicine, Meridian, Idaho