1. Department of Otolaryngology-Head and Neck Surgery; The Ohio State University Wexner Medical Center; Ohio U.S.A
2. College of Medicine; The Ohio State University; Columbus Ohio U.S.A
3. Department of Neurological Surgery; The Ohio State University Wexner Medical Center; Ohio U.S.A
4. Department of Neurosurgery; Hospital Santa Cruz; Curitiba Brazil
5. Department of Otolaryngology-Head & Neck Surgery; Royal Prince Alfred Hospital; Sydney New South Wales Australia
6. Department of Radiology; The Ohio State University Wexner Medical Center; Ohio U.S.A