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Serum trace element concentrations and GPX3 activity in relation to PCOS. The direct comparison of serum (A) Zn, (B) Se, (C) Cu, and (D) GPX3 activity indicates minor differences only, with the notable exception of a slightly suppressed serum Zn concentration in PCOS. Tested with a linear mixed model; * indicates p < 0.05. ns indicates no significant difference.
