RT Journal Article SR Electronic T1 Chronic kidney disease: definition and staging – an orthodox view JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 563 OP 564 DO 10.7861/clinmedicine.9-6-563 VO 9 IS 6 A1 CG Winearls YR 2009 UL http://www.rcpjournals.org/content/9/6/563.abstract