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Data are expressed as mean ± SD (n=6 for activin A and n=9 for PAI-1). NT, no treatment; SR 100, strawberry extract at 100 μg/ml; SR 250, strawberry extract at 250 μg/ml; A, activin A at 4 nM. *P<0.05; **P<0.01; ***P<0.001.
