1 Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, USA.
2 Mayo Clinic Rhoton Neurosurgery and Otolaryngology Surgical Anatomy Program, Rochester, MN, USA.
3 Neurosurgical Unit, Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, Palermo, Italy.
4 Department of Neurosurgery, Acibadem CityClinic Tokuda Hospital Sofia, Bulgaria.
5 Neurosurgery Unit, Ospedale Moriggia Pelascini, Gravedona, Italy.
6 Salfort Royal NHS Foundation Trust, Manchester, USA.
7 Department of Neurosurgery, Cluj County Emergency Hospital, University of Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca, Romania.
8 Department of Clinical Neuroscience, Karolinska Institutet and Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden & Department of Neurosurgery, Rigshospitalet, Copenhagen, Denmark.
9 Department of Neurosurgery, Medical University of Innsbruck, Innsbruck, Austria.
10 Neurosurgery Department, Centro Hospitalar Lisboa Norte (CHLN), Lisbon, Portugal.
11 Addenbrooke's Hospital, Cambridge University Hospitals, Cambridge, USA.
12 Burdenko Neurosurgical Center, Department of Spinal and Peripheral Nerve Surgery, Department of International Affairs, Moscow, Russia.
13 Clinic for Neurosurgery, Military Medical Academy, Belgrade, Serbia.
14 Department of Neurosurgery, ASST Ospedale Niguarda, Milano, Italy.
15 Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
16 Department of Neurosurgery and Spine Center of Eastern Switzerland, Cantonal Hospital St.Gallen, St.Gallen, Switzerland.
17 Department of Neurosurgery, University Hospital Muenster, Germany.
18 Department of Neurosurgery, Hospital Universitario La Paz, Idipaz, Madrid, Spain.
19 University Autonomous of Madrid, Spain.
20 Department of Neurosurgery, The National Hospital, Rigshospitalet, Copenhagen, Denmark.
21 Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Unit of Neurosurgery, University of Messina, Messina, Italy.