RT Journal Article SR Electronic T1 Cochrane review: relaxation and yoga may decrease pain during labour and increase satisfaction with pain relief, but better quality evidence is needed JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP ebnurs-2012-100795 DO 10.1136/ebnurs-2012-100795 A1 Pamela Reis YR 2012 UL http://ebn.bmj.com/content/early/2012/06/28/ebnurs-2012-100795.abstract AB