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Christiansen AT, Tao SL, Smith M, Wnek GE, Prause JU, Young MJ, Klassen H, Kaplan HJ, la Cour M, Kiilgaard JF.Christiansen AT, et al. Among authors: klassen h.Stem Cells Int. 2012;2012:454295. doi: 10.1155/2012/454295. Epub 2012 Mar 15.Stem Cells Int. 2012.PMID: 22550509Free PMC article.