title: Comment on: excessive opioid use and the development of chronic migraine.
authors: Jim
authors: J
authors: Bartley
authors: Linda R
authors: LR
authors: Watkins
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D006801:Humans; D008881:Migraine Disorders / Q000188:drug therapy*
chemical_list: D000701:Analgesics, Opioid