Determinants of Intact Parathyroid Hormone and Free 1,25-Dihydroxyvitamin D Levels in Mild and Moderate Renal Failure

Parameters of calcium and phosphate metabolism were measured in 27 patients with mild renal failure [glomerular filtration rate (GFR) 40-90 ml/min], 12 patients with moderate renal failure (GFR 20-39