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Kominiarek MA, Lewkowitz AK, Carter E, Fowler SA, Simon M.Kominiarek MA, et al.BMC Pregnancy Childbirth. 2019 Jan 9;19(1):18. doi: 10.1186/s12884-018-2148-8.BMC Pregnancy Childbirth. 2019.PMID: 30626345Free PMC article.