title: Commentary: Epidemiology on the side of the angels.
authors.affiliation: INRS--Institut Armand Frappier, Université du Québec, 531 Boul. des Prainés, Laval, Quebec H7V 1B7, Canada. jack.siemiatycki@inrs-iaf.uquebec.ca
authors.forename: Jack
authors.initials: J
authors.lastname: Siemiatycki
mesh_terms: D004484:Ecuador / Q000453:epidemiology; D004781:Environmental Exposure; D015340:Epidemiologic Research Design; D019652:Extraction and Processing Industry; D009369:Neoplasms / Q000453:epidemiology*; D010578:Petroleum; D015980:Public Health Practice; D018570:Risk Assessment
chemical_list: D010578:Petroleum