1. Department of Neurology; Faculty of Health and Medical Sciences; Danish Headache Center; Rigshospitalet Glostrup; University of Copenhagen; Copenhagen Denmark
2. Functional Imaging Unit; Department of Clinical Physiology, Nuclear Medicine and PET; Faculty of Health and Medical Sciences; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
3. Department of Radiology; Faculty of Health and Medical Sciences; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
4. Faculty of Health and Medical Science; Institute of Clinical Medicine; University of Copenhagen; Copenhagen Denmark