DDAH1 and hypertensive disorder: Maas and co-workers [14] genotyped 783 individuals from a population-based cohort for SNPs in DDAH1 and DDAH2 and reported that DDAH2 rs805304 was not associated with baseline circulating ADMA, but that homozygous carriers of the major allele had an odds ratio of 1.70 (1.22–2.36) for the presence of hypertension.