title: Genetic causes of mental subnormality.
mesh_terms: D000409:Alanine / Q000652:urine; D000592:Amino Acid Metabolism, Inborn Errors / Q000175:diagnosis; D000782:Aneuploidy; D002869:Chromosome Aberrations / Q000235:genetics; D025063:Chromosome Disorders; D004314:Down Syndrome / Q000235:genetics; D006801:Humans; D006901:Hydroxylysine / Q000652:urine; D008607:Intellectual Disability / Q000235:genetics*; D008762:Methylhistidines / Q000652:urine
chemical_list: D008762:Methylhistidines; D006901:Hydroxylysine; D000409:Alanine