Feinberg Cardiovascular & Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois; and Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, Illinois Correspondence: Dr. Pinelopi P. Kapitsinou, email: [email protected] See related article, "Glycolysis in Peritubular Endothelial Cells and Microvascular Rarefaction in CKD," on pages XXX–XXX.