Kelemenova et al. (2010), using a sample of autistic boys in Slovakia, also focused their research on several candidate gene polymorphisms associated with autism, specifically OXT (rs2740204), OXTR (rs2228485), GABA receptor gamma 3 (rs28431127), neuroligin (rs5916338), and reelin. The authors found only one significant association: between autism and a higher number of GGC repeats in the (GGC)n STR polymorphism of the reelin gene, in addition to finding lower reelin levels in the blood and the brain of autistic patients. The gene discussed is RELN; the disease is autism.