title: Homocysteine and methylmalonate: when should I measure them and what do they mean?
authors.affiliation: Charles Dent Metabolic Unit, National Hospital for Neurology and Neurosurgery, London, UK.
authors.forename: Robin H
authors.initials: RH
authors.lastname: Lachmann
authors.affiliation: Charles Dent Metabolic Unit, National Hospital for Neurology and Neurosurgery, London, UK.
authors.forename: Anthony
authors.initials: A
authors.lastname: Briddon
keywords: B12 DEFICIENCY; BIOCHEMISTRY; GENETICS; METABOLIC DISEASE; THROMBOPHILIA