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Emerson LL, Layfield LJ.Emerson LL, et al. Among authors: layfield lj.Pathol Res Pract. 2012 Dec 15;208(12):726-9. doi: 10.1016/j.prp.2012.09.007. Epub 2012 Nov 3.Pathol Res Pract. 2012.PMID: 23131661