title: The FEP (free erythrocyte porphyrins) test: a screening micromethod for lead poisoning.
mesh_terms: D004912:Erythrocytes / Q000032:analysis*; D005069:Evaluation Studies as Topic; D005470:Fluorometry; D006801:Humans; D007854:Lead / Q000097:blood; D007855:Lead Poisoning / Q000175:diagnosis*; D008403:Mass Screening; D008832:Microchemistry; D009519:New York City; D011166:Porphyrins / Q000032:analysis*; D013054:Spectrophotometry, Atomic; D013997:Time Factors
chemical_list: D011166:Porphyrins; D007854:Lead