A regional quality control scheme for urine porphyrins.
Stevens
J F
JF
Department of Chemical Pathology, St. Stephens Hospital, London, UK.
D002624:Chemistry, Clinical / Q000379:methods; D006801:Humans; D011166:Porphyrins / Q000652:urine*; D011786:Quality Control; D011795:Surveys and Questionnaires
D011166:Porphyrins