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 ebnurs-2012-100946 DO 10.1136/eb-2012-100946 A1 William Paul McKay YR 2012 UL http://ebn.bmj.com/content/early/2012/10/24/eb-2012-100946.abstract AB