1. Department of Neurologic Surgery Mayo Clinic Rochester Minnesota USA
2. Department of Neurosurgery and Department of Otolaryngology ‐ Head and Neck Surgery Mayo Clinic Rhoton Neurosurgery and Otolaryngology Surgical Anatomy Program Rochester Minnesota USA
3. Department of Neurosurgery Hospital Italiano de Buenos Aires Buenos Aires Argentina
4. Division of Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences And Public Health University of Brescia Brescia Italy
5. Department of Otorhinolaryngology Head and Neck Surgery Mayo Clinic Rochester Minnesota USA