Clues in the tempos of cluster headache.
D002343:Carotid Artery, Internal / Q000503:physiopathology; D003027:Cluster Headache / Q000209:etiology / Q000503:physiopathology*; D004108:Dilatation, Pathologic; D006801:Humans; D013997:Time Factors; D014276:Trigeminal Nerve / Q000503:physiopathology; D014653:Vascular Headaches / Q000503:physiopathology*