1. Department of Surgery, The Johns Hopkins Hospital, Baltimore, Maryland
2. R. Adams Cowley Shock Trauma Center, Baltimore, Maryland
3. Center for Vein Restoration, Dothan, Alabama
4. Central Michigan University College of Medicine, Mount Pleasant
5. Inovia Vein Specialty Centers, Bend, Oregon
6. Department of Health Policy & Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
7. Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, The Johns Hopkins Hospital, Baltimore, Maryland