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Body mass (A) and serum levels of BUN (B) and PTH (C) of CKD and NL rats. Data are shown for 25, 30 and 35 weeks of age. Values are mean ± SD. *Significantly different from CKD at same age (P < 0.05); #significantly different from NL at 25 weeks (P < 0.05); @significantly different from CKD at 25 weeks (P < 0.05).
