1. Department of Pathology; Huslab; Helsinki University Hospital and Medicum; University of Helsinki; Helsinki Finland
2. Finnish Information Centre for Register Research; Helsinki Finland
3. Mehiläinen Corporation; Helsinki Finland
4. Neurosurgery; Clinical Neurosciences; Helsinki University Hospital and University of Helsinki; Helsinki Finland
5. Neurology; Clinical Neurosciences; Helsinki University Hospital and University of Helsinki; Helsinki Finland
6. Biomedicum Helsinki; University of Helsinki; Helsinki Finland
7. Institute of Neuroscience; Newcastle University; Newcastle upon Tyne United Kingdom