title: [Development regression in a child caused by vitamin B12 deficiency].
authors.affiliation: HYKS:n lastenklinikka, Helsinki.
authors.forename: T
authors.initials: T
authors.lastname: Kosonen
authors.forename: H
authors.initials: H
authors.lastname: Pihko
mesh_terms: D000328:Adult; D002658:Developmental Disabilities / Q000209:etiology*; D005260:Female; D006801:Humans; D007223:Infant; D008764:Methylmalonic Acid / Q000652:urine; D014805:Vitamin B 12 / Q000378:metabolism; D014806:Vitamin B 12 Deficiency / Q000150:complications* / Q000151:congenital / Q000652:urine
chemical_list: D008764:Methylmalonic Acid; D014805:Vitamin B 12