1. From the Departments of Diagnostic Radiology (K.S.H., T.C., D.V., A.A., K.M., A.B., L.M.B.) and Anatomical Sciences (G.N.), McGill University Health Centre, 1001 Blvd Décarie, Montreal, QC, Canada H4A 3J1; Department of Radiology, Auckland City Hospital, Auckland, New Zealand (R.F.); Department of Radiology, University of Chile Clinical Hospital, Independencia, Chile (N.M.); and Department of Radiology, University of British Columbia, Vancouver, Canada (D.M.L.).