1. Department of Otolaryngology-Head and Neck Surgery; Mayo Clinic School of Medicine; Rochester Minnesota U.S.A.
2. Department of Neurologic Surgery; Mayo Clinic School of Medicine; Rochester Minnesota U.S.A.
3. Department of Radiology; Mayo Clinic School of Medicine; Rochester Minnesota U.S.A.
4. Department of Pathology and Laboratory Medicine; Mayo Clinic School of Medicine; Rochester Minnesota U.S.A.
5. Department of Neurology; Mayo Clinic School of Medicine; Rochester Minnesota U.S.A.