Like that in leukemia, different combinations of SNPs result in different alleles, producing the NAT2 slow, intermediate, or fast acetylation phenotypes, as summarized by the authoritative NAT2 organization websites “http://nat2pred.rit.albany.edu/” and http://nat.mbg.duth.gr/Human%20NAT2%20alleles_2013.htm#_Footnotes [14]. Here, NAT2 is linked to leukemia.