Delta-amino-levulinic acid as an early sign of lead exposure.
D006801:Humans; D007854:Lead / Q000097:blood / Q000652:urine; D007855:Lead Poisoning / Q000097:blood / Q000175:diagnosis*; D007982:Levulinic Acids / Q000032:analysis*; D011166:Porphyrins / Q000652:urine
D007982:Levulinic Acids; D011166:Porphyrins; D007854:Lead