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Comparison of serum IL-β levels and hypothalamic NPY mRNA expression levels between the four groups. No significant differences were detected in the (A) serum IL-1β levels and (B) hypothalamic NPY mRNA expression levels between the rats in the four groups (P>0.05). IL-1β, interleukin-1β; S. chinensis, Schizandra chinensis; R. rosea, Rhodiola rosea; NPY, neuropeptide-Y.
