title: Is the need for analgesia influenced by the time of day?
authors.forename: R A
authors.initials: RA
authors.lastname: Steinbrook
mesh_terms: D000698:Analgesia; D017081:Cholecystectomy, Laparoscopic; D006801:Humans; D010149:Postoperative Pain / Q000188:drug therapy*; D013997:Time Factors