1. Vascular Surgery, Penn State Heart and Vascular Institute, Penn State Hershey College of Medicine, Hershey, PA, USA
2. Vascular Surgery, VA Boston HCS, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
3. Vascular Surgery, University of Michigan, Ann Arbor, MI, USA
4. Vascular Surgery, Albany Medical College, Albany, NY, USA
5. Vascular Medicine, University Hospitals Case Medical Center, Cleveland, OH, USA
6. Vascular Surgery, University of Maryland School of Medicine, Baltimore, MD, USA