1. From the Department of Surgery, Vascular Surgery, University of Michigan, Ann Arbor (J.A.D., O.R.P., T.W.W., P.K.H.)
2. Academic Department of Vascular Surgery, King’s College London, UK (P.S., A.S.)
3. Department of Medicine, Division of Hematology/Oncology, University of North Carolina at Chapel Hill (B.C., S.P.G., N.M.)
4. Department of Surgery, University of Maryland, College Park (B.K.L.).