title: Conceptualizing the relationship between chronic migraine and episodic migraine.
authors.forename: Richard B
authors.initials: RB
authors.lastname: Lipton
authors.forename: Min Kyung
authors.initials: MK
authors.lastname: Chu
mesh_terms: D002908:Chronic Disease; D006801:Humans; D008881:Migraine Disorders / Q000145:classification / Q000503:physiopathology