A correlation between the SSRI, fluvoxamine, and the ‘L’ variant genotype of the serotonin transporter gene (SLC6A4) was found in a study of 18 children with autism, supporting a link between serotonin and ASD and providing preliminary support for the effectiveness of SSRIs as an alternative treatment for ASD [12]. The gene discussed is SLC6A4; the disease is Autistic behavior.