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Effect of dietary zinc (Zn) and challenge (C) on serum zinc concentration on the day (D) 0, 5, 7, and 14 (n = 12). Estimated marginal means with 95% confidence intervals are shown. abcIndicate differences (P ≤ 0.05) between Zn concentrations within challenge group and day. xyIndicate differences (P ≤ 0.05) between the challenge groups within Zn concentration and day.
