1. Section of Vascular Surgery, Dartmouth–Hitchcock Medical Center, Lebanon, NH, USA
2. Department of Surgery, Emory Clinic, Decatur, GA, USA
3. Department of Surgery, Mt Sinai Medical Center, New York, NY, USA
4. Department of Surgery, University of Rochester Medical Center, Rochester NY, USA
5. Munson Medical Center, Traverse City, MI, USA
6. Walter Reed Army Medical Center, Washington, DC, USA
7. Division of Vascular Surgery, University of Utah, Salt Lake City, UT, USA
8. Section of Vascular and Endovascular Surgery, Boston Medical Center, Boston, MA, USA