title: Pain and sleep.
authors.forename: E S
authors.initials: ES
authors.lastname: Friedrichs
mesh_terms: D000698:Analgesia / Q000379:methods*; D002908:Chronic Disease; D006801:Humans; D009294:Narcotics / Q000494:pharmacology; D059408:Pain Management; D012890:Sleep / Q000187:drug effects
chemical_list: D009294:Narcotics