1. Department of Neurology; Drammen Hospital, Vestre Viken Hospital Trust; Drammen Norway
2. Institute of Clinical Medicine; University of Oslo; Oslo Norway
3. Programme for Pharmacy, Faculty of Health Sciences; Oslo Metropolitan University; Oslo Norway
4. The National Center for Epilepsy; Oslo University Hospital; Oslo Norway
5. Department of Pharmacology, Section for Clinical Pharmacology, The National Center for Epilepsy; Oslo University Hospital; Oslo Norway