1. From the Division of Vascular Surgery, Department of Surgery (A.M.F., J.Y., K.-U.J., N.J.L.), Stanford University School of Medicine, CA
2. Geisel School of Medicine at Dartmouth, Hanover, NH (A.M.F.)
3. Department of Radiology (N.H.-N.), Stanford University School of Medicine, CA
4. Department of Biomedical Engineering, Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing (B.R.S.)
5. Division of Cardiovascular Medicine, Department of Medicine (N.J.L.), Stanford University School of Medicine, CA
6. Stanford Cardiovascular Institute, CA (N.J.L.).