1. Department of Surgery and Medicine, Cardiovascular Institute Maine Medical Center Portland Maine USA
2. Department of Surgery, Section of Cardiac Surgery Dartmouth‐Hitchcock Medical Center Lebanon New Hampshire USA
3. Department of Medicine, Section of Cardiology University of Vermont Medical Center Burlington Vermont USA
4. Department of Surgery, Section of Cardiac Surgery University of Vermont Medical Center Burlington Vermont USA
5. Department of Internal Medicine, Section of Cardiovascular Medicine Dartmouth‐Hitchcock Medical Center Lebanon New Hampshire USA
6. New England Heart Institute Catholic Medical Center Manchester New Hampshire USA
7. Northern Light Cardiology Northern Light Eastern Maine Medical Center Bangor Maine USA
8. Tufts University School of Medicine Boston Massachusetts USA