The number of colonic crypts with symmetric fission and with corrupted fission in 35 male rats: 25 Sprague-Dawley (SD) rats injected for 27 weeks with 1,2 Dimethylhydrazine (DMH) suspended in EDTA, and 10 male SD rats injected with EDTA for 27 weeks.

The number of colonic crypts with symmetric fission and with corrupted fission in 35 male rats: 25 Sprague-Dawley (SD) rats injected for 27 weeks with 1,2 Dimethylhydrazine (DMH) suspended in EDTA, and 10 male SD rats injected with EDTA for 27 weeks.35只雄性大鼠的结肠隐窝（colonic crypts）中，发生对称分裂（symmetric fission）与受损分裂（corrupted fission）的隐窝数量统计如下：其中25只斯普拉格-道利（Sprague-Dawley, SD）大鼠以悬浮于乙二胺四乙酸（EDTA）中的1,2-二甲基肼（1,2 Dimethylhydrazine, DMH）进行为期27周的注射处理；剩余10只雄性SD大鼠则以乙二胺四乙酸（EDTA）进行为期27周的注射处理。