1. Neurobiology Research Unit Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
2. Department of Neurology Odense University Hospital Odense Denmark
3. Danish Headache Center, Department of Neurology Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
4. Department of Psychology University of Copenhagen Copenhagen Denmark
5. Department of Forensic Medicine, Section of Forensic Chemistry, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
6. Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark