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Torvaldsen S, Roberts CL, Simpson JM, Thompson JF, Ellwood DA.Torvaldsen S, et al. Among authors: simpson jm.Int Breastfeed J. 2006 Dec 11;1:24. doi: 10.1186/1746-4358-1-24.Int Breastfeed J. 2006.PMID: 17134489Free PMC article.