title: Delta-aminolevulinic acid and lead in urine of lead antiknock workers.
mesh_terms: D004781:Environmental Exposure; D006801:Humans; D007854:Lead / Q000652:urine*; D007982:Levulinic Acids / Q000652:urine*; D008297:Male; D009790:Occupations; D010578:Petroleum
chemical_list: D007982:Levulinic Acids; D010578:Petroleum; D007854:Lead