1. From the Departments of Radiology (O.O.K., V.A.A., O.O.A.) and Pediatrics (O.A.), Obafemi Awolowo University Teaching Hospitals Complex, PMB 5538, Ilesa Rd, Ile-Ife 220212, Nigeria; and Department of Radiology, Afe Babalola University, Ado-Ekiti, Nigeria (C.O.).