1. Department of Neurosurgery, Basel University Hospital, University of Basel, Basel, Switzerland
2. Department of Neurosurgery, Bern University Hospital, University of Bern, Bern, Switzerland
3. Division of Neurosurgery, Department of Surgery, Maimonides Medical Center, Brooklyn, NY, USA
4. Department of Neurosurgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, NY, USA
5. Department of Neurosurgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
6. Division of Neurosurgery, Toronto Western Hospital, University Health Network and Department of Surgery, University of Toronto, Toronto, ON, Canada
7. Department of Neurosurgery, New York University School of Medicine, New York, NY, USA
8. Division of Diagnostic and Interventional Neuroradiology, Department of Radiology, Basel University Hospital, University of Basel, Basel, Switzerland