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Striatal (top panel) and substantia nigra (bottom panel) GDNF levels from animals treated with vehicle or calcitriol for eight consecutive days. Tissue was harvested on the eighth day of treatment. Values shown are mean ± SEM from 8-10 animals per group. * p < 0.05 vs. vehicle group (one way ANOVA followed by Newman-Keuls post-hoc comparisons).
