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Martins da Silva SJ, Bayne RA, Cambray N, Hartley PS, McNeilly AS, Anderson RA.Martins da Silva SJ, et al. Among authors: bayne ra.Dev Biol. 2004 Feb 15;266(2):334-45. doi: 10.1016/j.ydbio.2003.10.030.Dev Biol. 2004.PMID: 14738881Free article.