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Liu J, Jin T, Chang S, Ritchie HH, Smith AJ, Clarkson BH.Liu J, et al.In Vitro Cell Dev Biol Anim. 2007 Mar-Apr;43(3-4):120-8. doi: 10.1007/s11626-007-9022-8. Epub 2007 May 22.In Vitro Cell Dev Biol Anim. 2007.PMID: 17516126
Liu J, Jin TC, Chang S, Czajka-Jakubowska A, Clarkson BH.Liu J, et al.J Biomed Mater Res A. 2011 Mar 1;96(3):528-34. doi: 10.1002/jbm.a.33002. Epub 2011 Jan 4.J Biomed Mater Res A. 2011.PMID: 21254384Free PMC article.