title: Letter: Use of "low-lead" vacutainers for blood collection in ALA-D assay.
mesh_terms: D001800:Blood Specimen Collection / Q000295:instrumentation*; D004912:Erythrocytes / Q000201:enzymology*; D005069:Evaluation Studies as Topic; D005898:Glass; D006801:Humans; D006836:Hydro-Lyases / Q000097:blood*; D007854:Lead; D007982:Levulinic Acids; D008722:Methods; D000623:Porphobilinogen Synthase / Q000097:blood
chemical_list: D007982:Levulinic Acids; D007854:Lead; D006836:Hydro-Lyases; D000623:Porphobilinogen Synthase