目的：探讨小剂量米非司酮、氨甲喋呤（MTX）保守治疗宫外孕之疗效。方法：治疗前检查血常规、肝肾功能，无药物禁忌者给米非司酮25mg，每12h1......

Epigenetic changes such as DNA methylation regulate gene expression in normal development. Methotrexate and Adriamycine ......