Laboratory and clinical characteristics of participants at baseline and follow-up.

<p>NOTE. Data are expressed as mean ± S.D for normally distributed continuous variables; as median (interquartile range) for non-normally distributed continuous variables; and as number (percentage) for categorical variables.</p><p>Abbreviations: VAS, visual analog scale.</p>*<p><i>P</i><0.05 for the statistical testing between baseline and follow-up.</p>**<p>Ca×P = Product of albumin-adjusted serum calcium (Ca) and serum phosphorus (P).</p>