1. From the Department of Radiology, VA Puget Sound Health Care System, Seattle, Wash (B.R.); and Departments of Radiology (B.R., G.J.W., N.L., N.B., J.H.M.) and Plastic Surgery (P.C.N.), University of Washington School of Medicine, 1959 NE Pacific St, Seattle, WA 98195-7115.