title: Philip Morris clinical study of carbon filtered cigarettes challenged by nondisclosure issues.
authors: John L
authors: JL
authors: Pauly
authors: Vaughan
authors: V
authors: Rees
authors: Richard
authors: R
authors: O'Connor
mesh_terms: D002244:Carbon; D030881:Disclosure; D005374:Filtration; D006801:Humans; D012106:Research; D014026:Nicotiana; D019460:Tobacco Industry
chemical_list: D002244:Carbon