male

residency outside Denmark

registered in Civil Registry as not to be contacted by researchers

severe neurological (vascular, neurodegenerative or neuroinflammatory) disorders, or other somatic or psychiatric disorders

mobile metal parts or other contraindication for MRI

weight of 130+ kilograms

pregnancy

subjects that wished not to be informed about abnormal findings on MRI

chronic tension-type headache, medication overuse headache, or cluster headache (diagnosed through physician interview)

frequent tension-type headache (control group only, self-reported or diagnosed through physician interview)

Women With Migraine With Aura Neuroimaging Study