title: Improved recoveries in the extraction of steroids from neonatal urine.
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D006801:Humans; D006854:Hydrocortisone / Q000652:urine; D007231:Infant, Newborn; D013256:Steroids / Q000652:urine*
chemical_list: D013256:Steroids; D006854:Hydrocortisone