1. From the Department of Diabetes and Angiology, Marienkrankenhaus, Soest, Germany; the
2. Department of Public Health, Faculty of Medicine, Heinrich-Heine-University, Düsseldorf, Germany; the
3. Department of Vascular Surgery, Gefäßzentrum Oberrhein, Diakonissen-Stiftungs-Krankenhaus Speyer, Mannheim, Germany; and the
4. Southern Arizona Limb Salvage Alliance (SALSA), Department of Surgery, University of Arizona College of Medicine, Tucson, Arizona