title: Circadian rhythmicity in back pain: its relationship to short and long interval ibuprofen therapy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001416:Back Pain / Q000188:drug therapy*; D002940:Circadian Rhythm; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D007052:Ibuprofen / Q000008:administration & dosage* / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged
chemical_list: D007052:Ibuprofen