ASD, autism spectrum disorder; ADI-R, Autism Diagnostic Interview-Revised; DHA, docosahexaenoic acid; ARA, arachidonic acid; DGLA, dihomo-γ-linolenic acid; MDA-LDL, malondialdehyde-modified low-density lipoprotein; Tf, transferrin; SOD, superoxide dismutase; Cp, ceruloplasmin; PUFAs, polyunsaturated fatty acids; ABC, Aberrant Behavior Checklist. Here, SOD1 is linked to autism.