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Walker PA, Jimenez F, Gerber MH, Aroom KR, Shah SK, Harting MT, Gill BS, Savitz SI, Cox CS Jr.Walker PA, et al.Tissue Eng Part C Methods. 2010 Oct;16(5):989-97. doi: 10.1089/ten.TEC.2009.0423.Tissue Eng Part C Methods. 2010.PMID: 20001789Free PMC article.