title: New appendix criteria open for a broader concept of chronic migraine.
authors: Seymour
authors: S
authors: Solomon
mesh_terms: D002908:Chronic Disease; D003937:Diagnosis, Differential; D003953:Diagnosis-Related Groups / Q000592:standards*; D006801:Humans; D038622:Internationality; D008881:Migraine Disorders / Q000145:classification* / Q000175:diagnosis*; D010147:Pain Measurement / Q000592:standards*; D017410:Practice Guidelines as Topic / Q000592:standards*; D009626:Terminology as Topic