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The figure shows the dose-response curves to morphine (0.5-7.5 mg/kg) in offspring born of morphine 5 mg/kg-treated mothers. The scores were calculated according to the protocol detailed in main text and shown as mean ± SEM. Post hoc analyses show**P< 0.01, ***P< 0.001, #P< 0.05, ##P< 0.01, ###P< 0.001 differences to controls
