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Plasma sodium (mEq/L) at baseline (before therapy) and on days 1, 2, and 3 of urea therapy and on the fifth day after urea discontinuation (post-urea). ANOVA analysis (excluding the last time point) for sodium changes over time – = p = 0.001. * = p < 0.01 vs. baseline, $ = p < 0.01 vs. day 1 in post-hoc Bonferroni correction.
