1. Zimmet Vein and Dermatology, Austin, TX, USA
2. The Department of Radiology, Weill Cornell Medical College, New York, NY, USA
3. The Jobst Vascular Institute, Toledo, OH, USA
4. The Department of Surgery, University of Washington School of Medicine, Seattle, WA, USA
5. Cardiovascular Medicine, Case Western Reserve University School of Medicine, Cleveland, OH, USA
6. Vascular Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
7. The Vascular Center, Massachusetts General Hospital, Boston, MA
8. Department of Surgery, Section of Vascular Surgery, University of Michigan Health System, Ann Arbor, MI, USA
9. The Department of Emergency Medicine, Georgetown University School of Medicine, Washington, DC, USA