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Effect of ethanolic extract of Bletilla striata on the cleaved caspase-3 of neuronal cells. A: Control; B: Negative control; C: BS 35 mg / kg; D: BS 70 mg / kg; E: BS 140 mg / kg. Mean ± SEM (n = 10), ** p < 0.01 than control group; ## p < 0.01 than negative control group
