1. From the Department of Radiology, Mayo Clinic, 4500 San Pablo Rd S, Jacksonville, FL 32224 (J.T.S., E.H.M., D.F.B., A.A.B.); Department of Radiology and Biomedical Imaging, University of California–San Francisco, San Francisco, Calif (P.J.); and Department of Plastic and Reconstructive Surgery, Mayo Clinic, Rochester, Minn (J.M.J.).