Guilt by association?
D001921:Brain / Q000378:metabolism; D002675:Child, Preschool; D003553:Cystine / Q000378:metabolism; D003555:Cystinuria / Q000150:complications* / Q000453:epidemiology / Q000235:genetics / Q000378:metabolism; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology; D001523:Mental Disorders / Q000150:complications / Q000209:etiology*
D003553:Cystine