RT Journal Article SR Electronic T1 Intravenous analgesia for out-of-hospital traumatic pain in adults: ketamine gives a greater reduction in pain than morphine but causes more adverse effects JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 58 OP 59 DO 10.1136/eb-2012-100946 VO 16 IS 2 A1 McKay, William Paul YR 2013 UL http://ebn.bmj.com/content/16/2/58.abstract AB