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.