1. Section of Vascular Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire2Dartmouth-Hitchcock Medical Center, Dartmouth Institute for Health Policy and Clinical Practice, Lebanon, New Hampshire
2. Center for Outcomes Research and Evaluation, Maine Medical Center, Portland4Center for Health Outcomes and Policy, University of Michigan, Ann Arbor
3. Section of Vascular Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
4. Dartmouth-Hitchcock Medical Center, Dartmouth Institute for Health Policy and Clinical Practice, Lebanon, New Hampshire