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Effect of the activation of bFGF on the induction of apoptosis in cultured human GF. (a) Comparison of caspase-3 activity between 70% confluent and 100% confluent groups. (b) Time course of caspase-3 activity in 100% confluent group. Error bars indicate a standard deviation. N = 8, *P < 0.05, **P < 0.01.
