Affiliation: | (1) From the Departments of Surgery and Radiology, Veterans Administration Medical Center, the Department of Surgery, University of Washington School of Medicine, and the Department of Surgery, The Mason Clinic, Seattle, Washington;(2) the Saint Joseph Medical Center, Burbank, California;(3) the Division of Vascular Surgery, Department of Surgery, Oregon Health Sciences University, Portland, Oregon;(4) the Department of Surgery, University of California, San Francisco, California |