Recently, the group run by Fernando measured uRBP4 and seven other chosen renal urinary proteins in CKD of known and uncertain etiology and found that RBP4, alpha 1 microglobulin (A1M), and kidney injury molecule-1 (KIM1) represent a minimum marker combination for differentiating all CKD categories from healthy controls. This evidence concerns the gene HAVCR1 and chronic kidney disease.