title: A retrospective study on the use of oral morphine in cancer pain.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage* / Q000627:therapeutic use; D009369:Neoplasms / Q000503:physiopathology*; D010146:Pain / Q000188:drug therapy*; D012189:Retrospective Studies
chemical_list: D009020:Morphine