Farid, Ibrahim S The safety and efficacy of hydromorphone via patient controlled analgesia or patient controlled analgesia by proxy for pediatric postoperative pain control. [electronic resource] - Journal of clinical anesthesia Mar 2020 - 65-66 p. digital Publication Type: Letter ISSN: 1873-4529 Standard No.: 10.1016/j.jclinane.2019.08.033 doi Subjects--Topical Terms: Analgesia, Patient-ControlledAnalgesics, Opioid--adverse effectsChildHumansHydromorphone--adverse effectsMorphinePain, Postoperative--drug therapy