But discordance between the two methods existed in 8 (21.1%) cases (5E +P gp -, 3E -P gp +). E +P gp - suggested that non classic multidrug resistance (MDR1) mediated efflux system might exist in ANLL.

• 21.；1%25存在表达与活性分离（3例P?gp＋E－，5例P?gp－E＋），P?gp－E＋提示非P?gp介导的排出活性在ANLL耐药中可能具有重要作用。