1 Division of Vascular and Endovascular Surgery, Department of Surgery, University of Massachusetts Medical School, Worcester, Mass.
2 Division of Vascular Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, Calif. Electronic address: kwoo@mednet.ucla.
3 Society for Vascular Surgery Quality and Performance Measures Committee, Chicago, Ill.
4 Division of Vascular Surgery, Department of Surgery, University of South Florida, Tampa, Fla.
5 Division of Vascular Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, Calif.