Neutrophil counts in mice after 5-FU treatment. 5-FU (150 mg/kg) was given intraperitoneally to the wild-type and C/EBPβ-deficient mice. Blood samples were taken from the ocular sinus at 0, 1, 4, 7, 10, and 14 days, and neutrophils were counted. Black and broken lines show their mean plus or minus SD results from wild-type and C/EBPβ-deficient mice, respectively.