Particularly, in bladder carcinomas, Rady et al., (unpublished results) reported that BCRP (exports mono-, di-, and triglutamates of folates) expression was decreased, whereas MRP3, which have restricted ability to export only monoglutamate folates, was found to be overexpressed [Unpublished work by Rady et al. 2009]. This evidence concerns the gene ABCG2 and urinary bladder carcinoma.