1. National Center for Epilepsy; Oslo University Hospital; Sandvika Norway
2. Department of Nutrition; University of Oslo; Oslo Norway
3. Faculty of Medicine; University of Oslo; Oslo Norway
4. Department of Hematology; Oslo University Hospital; Oslo Norway
5. Oslo Center of Biostatistics and Epidemiology; Department of Biostatistics; University of Oslo; Oslo Norway
6. Department of Neurology; Oslo University Hospital; Oslo Norway
7. Department of Medical Genetics; Oslo University Hospital and University of Oslo; Oslo Norway