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A) EryP-CFC (mean ± SEM) per 1000 yolk sac explant cells cultured in vitro for 48 hours with 0, 0.4, and 0.8 mM VPA. B) Number of live cells (mean ± SEM) per yolk sac explant with 0, 0.4, and 0.8 mM VPA.
