 - Has stage 1-5 chronic kidney disease CKD as defined by the Kidney Disease Outcomes Quality Initiative KDOQI with proteinuria, including any of the following aetiologies: immunoglobulin IgA nephropathy, polycystic kidney disease PCKD, congenital abnormalities, reflux nephropathy, focal segmental glomerulosclerosis, minimal change nephropathy, and membranous nephropathy. 