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Claassen AA, Gorter JW, Stewart D, Verschuren O, Galuppi BE, Shimmell LJ.Claassen AA, et al. Among authors: shimmell lj.BMC Pediatr. 2011 Jan 7;11:1. doi: 10.1186/1471-2431-11-1.BMC Pediatr. 2011.PMID: 21214908Free PMC article.
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Freeman M, Stewart D, Shimmell L, Missiuna C, Burke-Gaffney J, Jaffer S, Law M.Freeman M, et al.Child Care Health Dev. 2015 Mar;41(2):222-9. doi: 10.1111/cch.12199. Epub 2014 Oct 22.Child Care Health Dev. 2015.PMID: 25338500