title: Commentary.
authors: Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA. bennettmi@email.chop.edu
authors: Michael J
authors: MJ
authors: Bennett
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D001826:Body Fluids / Q000737:chemistry*; D002852:Chromatography, Ion Exchange; D006801:Humans; D009555:Ninhydrin
chemical_list: D000596:Amino Acids; D009555:Ninhydrin