Abstract BACKGROUND & AIM: To study the DNA damage of BALB/c mice caused by multiple treatment with low-dose methotrexate (MTX)and the protective effect of folinic acid(FA).

• 摘要 背景与目的：研究多次低剂量应用甲氨蝶呤所致BALB/c小鼠淋巴细胞及骨髓细胞DNA的损伤，并探讨甲酰四氢叶酸对其损伤的保护作用。