VILHELMSDOTTER ALLANDER , S.; MARKÉ , L.- ÅKE; WIHLEN , B.; SVENSSON , M.; ELINDER , C.-G.; LARSSON , A. Regional variation in use of exogenous and endogenous glomerular filtration rate (GFR) markers in Sweden. Upsala Journal of Medical Sciences, v. 117, n. 3, 8 Mar. 2012.