RT Journal Article SR Electronic T1 Diet and physical activity interventions reduce pregnancy weight gain compared with control, with dietary interventions having the greatest effect JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP ebnurs2012100889 DO 10.1136/eb-2012-100889 A1 Nicola Heslehurst YR 2012 UL http://ebn.bmj.com/content/early/2012/10/24/eb-2012-100889.abstract AB