1 Rhoton Neurosurgery and Otolaryngology Surgical Anatomy Program, Mayo Clinic, Rochester, Minnesota, USA.
2 Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
3 Division of Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy.
4 Department of Otolaryngology/Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, USA.