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