1. From the Department of Neurosurgery, Kuopio University Hospital, Finland (A.L.)
2. Departments of Neurology and Neurosurgery (M.D.I.V., A.A., G.J.E.R.), University Medical Center Utrecht, the Netherlands
3. Radiology (I.C.V.d.S.), University Medical Center Utrecht, the Netherlands
4. Julius Center for Health Sciences and Primary Care (A.A.), University Medical Center Utrecht, the Netherlands
5. Department of Neurology, Leiden University Medical Center, the Netherlands (M.J.H.W.)
6. Centre for Public Health, Queen’s University Belfast, United Kingdom (M.J.C.).