1. Section of Vascular Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire2VA Outcomes Group, White River Junction, Vermont3Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth Medical School, Hanover, New Hampshire
2. Section of Vascular Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
3. Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth Medical School, Hanover, New Hampshire
4. Section of Vascular Surgery, University of Massachusetts School of Medicine, Worcester
5. Section of Vascular Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire2VA Outcomes Group, White River Junction, Vermont