title: Melatonin for cluster headache.
authors.forename: M G
authors.initials: MG
authors.lastname: Smits
authors.forename: J E
authors.initials: JE
authors.lastname: Nagtegaal
mesh_terms: D002940:Circadian Rhythm / Q000187:drug effects*; D003027:Cluster Headache / Q000188:drug therapy*; D006801:Humans; D008550:Melatonin / Q000009:adverse effects* / Q000627:therapeutic use*
chemical_list: D008550:Melatonin