title: Is medication-overuse headache a distinct biological entity?
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Goadsby
mesh_terms: D000700:Analgesics / Q000009:adverse effects*; D006261:Headache / Q000139:chemically induced* / Q000145:classification*; D006801:Humans
chemical_list: D000700:Analgesics