KRAS and acute promyelocytic leukemia: Both KRAS and NRAS expressions were not correlated with CR rate among non-acute promyelocytic leukemia (APL) patients [43% (34/79, KASlow) vs 29% (10/34, KRASlow), P=0.210 and 41% (32/79, NRASlow) vs 35% (12/34, NRAShigh), P=0.677].