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Bick DE, Ismail KM, Macdonald S, Thomas P, Tohill S, Kettle C.Bick DE, et al. Among authors: ismail km.BMC Pregnancy Childbirth. 2012 Jun 25;12:57. doi: 10.1186/1471-2393-12-57.BMC Pregnancy Childbirth. 2012.PMID: 22731799Free PMC article.