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Interactive effects of IGF-I and EGF on kitlga expression. The follicle cells were treated with IGF-I (50 ng/ml) and EGF (50 nM) alone or in combination for 6 hours. The data were normalized to the housekeeping gene ef1a and expressed as the percentage of the control group (mean ± SEM, n = 4). Different letters indicate statistical significance (P < .05).
