1. From the Department of Neurosurgery, University Hospital Zurich and Clinical Neuroscience Center, University of Zurich, Switzerland (M.N.S., E.K., O.B., L.R.)
2. School of Population and Global Health, University of Melbourne, Australia (N.R.S.)
3. Department of Neurosurgery, Inselspital Bern, Switzerland (C.F., J.G., D.B.)
4. Department of Neurosurgery, University Hospital Lausanne, Switzerland (R.M.)
5. Department of Neurosurgery, Ospedale Regionale di Lugano, Switzerland (A.C., T.R.)
6. Department of Neurosurgery, Hôpitaux Universitaires de Genève, Switzerland (A.M., P.B., K.S.)
7. Department of Neurosurgery, University Hospital Basel, University of Basel, Switzerland (D.Z., M.R.)
8. Section of Diagnostic and Interventional Neuroradiology, Department of Radiology, Basel University Hospital, University of Basel, Switzerland (D.Z.)
9. Department of Neurosurgery, Kantonsspital St.Gallen, Switzerland (M.A.S.)
10. Department of Neurosurgery, Kantonsspital Aarau, Switzerland (S.M., J.F.)
11. Department of Neurosurgery, University Hospital Göttingen, Germany (B.S.).