1. Department of Surgery, Division of Vascular and Endovascular Surgery, Southern Arizona Limb Salvage Alliance, University of Arizona College of Medicine, Tucson, Arizona
2. Department of Biology, Manhattan College, Riverdale, New York
3. Department of Plastic Surgery, The University of Texas, Southwestern Medical Center, Dallas, Texas
4. Department of Surgery, Division of Vascular Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina
5. Department of Medicine, University of Manchester and Royal Infirmary, Manchester, U.K.