NAT2 and acute lymphoblastic leukemia: Nevertheless, homozygotes genotypes TT and AA of NAT2 SNPs rs1041983 (C282T) and rs1799931 (G857A), respectively, were associated with a reduced risk of ALL under exposure to hydrocarbons by the mother at home before and during pregnancy and after birth (HEMAB), drug consumption, active smoking, alcohol consumption and insecticide exposure by the mother before pregnancy, whilst being pregnant and while child feeding.