title: New urinary methylmalonic acid test is a sensitive indicator of cobalamin (vitamin B12) deficiency: a solution for a major unrecognized medical problem.
mesh_terms: D006801:Humans; D008314:Malonates / Q000652:urine*; D008764:Methylmalonic Acid / Q000652:urine*; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis*
chemical_list: D008314:Malonates; D008764:Methylmalonic Acid