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. 2010 Jun 9;4:53–60. doi: 10.4137/grsb.s4880

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Figure 1. — The glomerular filtration rate (GFR) and the selected physiological states in CKD patients. The numbers in brackets are the numbers of patients. For a description of data gathering and processing see text. A) PTH concentration in serum. B) Calcitriol concentration in serum. C) Ca concentration in serum. D) P concentration in serum. E) Urinary output of Ca expressed as a fraction of the glomerular Ca load (U_Ca_R). F) Urinary output of P expressed as a fraction of the glomerular P load (U_P_R).