From the Departments of Otorhinolaryngology (F.H., T.M.K., W.J.H., E.A.M.M.) and Radiology (W.J.v.d.W., B.M.V.), Radboud University Medical Center, Philips van Leydenlaan 16, Route 377, PO Box 9101, 6500 HB Nijmegen, the Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, the Netherlands (F.H., T.M.K., W.J.H., E.A.M.M.); Department of Radiology, Civil Hospital, Vigevano, Italy (F.L.); and Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands (B.M.V.).