title: Principles for application of porphyrin markers in epidemiological studies.
authors.affiliation: Department of Community Medicine, Mount Sinai School of Medicine, New York, New York 10029.
authors.forename: P J
authors.initials: PJ
authors.lastname: Landrigan
mesh_terms: D004781:Environmental Exposure; D004812:Epidemiologic Methods; D006801:Humans; D011166:Porphyrins / Q000032:analysis* / Q000633:toxicity
chemical_list: D011166:Porphyrins