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Williams EJ, Embleton ND, Clark JE, Bythell M, Ward Platt MP, Berrington JE.Williams EJ, et al.J Pediatr. 2013 Aug;163(2):424-8. doi: 10.1016/j.jpeds.2013.02.004. Epub 2013 Mar 16.J Pediatr. 2013.PMID: 23507026
Lorch SA, Kroelinger CD, Ahlberg C, Barfield WD.Lorch SA, et al.Am J Public Health. 2012 Oct;102(10):1902-10. doi: 10.2105/AJPH.2012.300852. Epub 2012 Aug 16.Am J Public Health. 2012.PMID: 22897542Free PMC article.
Oladapo OT, Adekanle DA, Durojaiye BO.Oladapo OT, et al.Aust N Z J Obstet Gynaecol. 2007 Oct;47(5):383-8. doi: 10.1111/j.1479-828X.2007.00761.x.Aust N Z J Obstet Gynaecol. 2007.PMID: 17877595
Farah N, Hogan J, Johnson S, Stuart B, Daly S.Farah N, et al.Acta Obstet Gynecol Scand. 2012 Mar;91(3):382-5. doi: 10.1111/j.1600-0412.2011.01288.x. Epub 2011 Nov 3.Acta Obstet Gynecol Scand. 2012.PMID: 21950601Free article.