GSTM1 and acute myeloid leukemia: In the de novo AML patient group, a positive and highly significant correlation was found between NRP-1 RNA level and TLC (r=0.551, p=0.008), as well as between NRP-1 RNA and both PB blast % and CD117 (r= 0.452, 0.451 respectively and p=0.035, 0.035 respectively), but a negative significant correlation was detected with Hb (r=-0.504, p=0.017).