Methods The expression of MDR1 gene in 77 cases of AL patients and 10 cases of control group was detected with semi quantitative reverse transcription polymerase chain reaction (RT PCR).

• 方法 采用半定量逆转录聚合酶链反应（ R T? P C R），对77 例 A L病人及 10 例正常人 M D R1 基因表达进行检测。