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Cheng Y, Brunner AL, Kremer S, DeVido SK, Stefaniuk CM, Kassis JA.Cheng Y, et al.Dev Biol. 2014 Nov 1;395(1):131-43. doi: 10.1016/j.ydbio.2014.08.021. Epub 2014 Aug 27.Dev Biol. 2014.PMID: 25172431Free PMC article.
Cheng Y, Nash HA.Cheng Y, et al.Proc Natl Acad Sci U S A. 2007 Nov 6;104(45):17730-4. doi: 10.1073/pnas.0708368104. Epub 2007 Oct 29.Proc Natl Acad Sci U S A. 2007.PMID: 17968007Free PMC article.