title: Comments on "PM2.5 and mortality in long-term prospective cohort studies: cause-effect or statistical associations?".
authors.forename: N
authors.initials: N
authors.lastname: Künzli
authors.forename: I B
authors.initials: IB
authors.lastname: Tager
mesh_terms: D002986:Clinical Trials as Topic; D018876:Environmental Illness / Q000209:etiology*; D006801:Humans; D015233:Models, Statistical; D009026:Mortality; D011446:Prospective Studies