1. Mayo Clinic Rhoton Neurosurgery and Otolaryngology Surgical Anatomy Program, Mayo Clinic, Rochester, Minnesota, USA
2. Department of Neurosurgery and Gamma Knife radiosurgery, Vita-Salute San Raffaele University and IRCCS San Raffaele Scientific Institute, Milan, Italy
3. Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, United States
4. Department of Otolaryngology/Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, USA