title: Correlation of ZPP values and blood lead values in lead workers.
mesh_terms: D006801:Humans; D007854:Lead / Q000097:blood*; D007855:Lead Poisoning / Q000175:diagnosis*; D009784:Occupational Diseases / Q000175:diagnosis*; D011166:Porphyrins / Q000097:blood*; D011524:Protoporphyrins / Q000097:blood*
chemical_list: D011166:Porphyrins; D011524:Protoporphyrins; D007854:Lead