VWF and endothelial dysfunction: The measured glomerular filtration rate (mGFR) by iohexol clearance, estimated GFR according to the CKD-EPI and MDRD-4 formulas, and levels of endothelial dysfunction (sVCAM-1, sICAM-1, E-selectin, von Willebrand Factor, pentraxin, and urinary albumin-to-creatinine ratio) and subclinical inflammation biomarkers (sIL-6, sTNF-R1, sTNF-R2, sTWEAK, and high-sensitivity C-reactive protein) were determined at baseline and 1-year follow-up.