Publication info: BJOG: An International Journal of Obstetrics & Gynaecology. 2014. 121(6): 728-738PMID: 24148762External link: http://onlinelibrary.wiley.com/doi/10.1111/1471-0528.12459/abstractPublication date: May, 2014Authors: Lai J, Elleray R, Nordin A, Hirschowitz L, Rous B, Gildea C, Poole JGroup: AnalysisRegistry: National Disease Registration Service, EnglandPublication type: Paper