et al. [2003]. In addition, we genotyped the rs25531 SNP to assess whether it further refines any association with 5HTTLPR. In human studies of this polymorphism's association with neurological activity both S-dominant [Lesch et al., 1996; Hranilovic et al., 2004; Hariri et al., 2005; Heinz et al., 2005] and additive [Bradley et al., 2005; Hu et al., 2006] models are observed, so we consider both here.
