title: Commentary: Snow's paper on 'offensive trades'--with the benefit of 150 years of hindsight.
authors.affiliation: Leiden University Medical Center, Department of Clinical Epidemiology, PO Box 9600, 2300 RC Leiden, The Netherlands. J.P.Vandenbroucke@lumc.nl.
authors.forename: Jan P
authors.initials: JP
authors.lastname: Vandenbroucke
mesh_terms: D002771:Cholera / Q000401:mortality*; D006801:Humans; D009784:Occupational Diseases / Q000401:mortality*