1. . National Kidney Foundation. K/DOQI clinical practice guidelines for chronic kidney disease: evaluation, classification, and stratification. Am J Kidney Dis2002;39(2 Suppl 1):S1-S266.
2. National Kidney Disease Education Program. Health Professionals: Chronic kidney disease overview. http://nkdep.nih.gov/professionals/chronic_kidney_disease.htm (accessed August 2006)..
3. National Kidney Disease Education Program. Suggestions for laboratories. http://nkdep.nih.gov/resources/laboratory_reporting.htm (accessed August 2006)..
4. Pizzi R. NKDEP launches creatinine standardization program. Clin Lab News2006;32(4):1-8.
5. Coresh J, Astor BC, McQuillan G, Kusek J, Greene T, Van Lente F, et al. Calibration and random variation of the serum creatinine assay as critical elements of using equations to estimate glomerular filtration rate. Am J Kidney Dis2002;39:920-929.