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Glomerular filtration rate (GFR) measured in conscious cre-negative (Cre−) and cre-positive (Cre+) mice of the SmCre/A1ARff (shaded bars) and NestinCre/A1ARff strains (open bars). Numerals indicate numbers of animals. Significant difference between cre-negative and cre-positive mice: *P < 0.05; **P < 0.01.
