title: Periodontitis-systemic disease associations in the presence of smoking--causal or coincidental?
authors.forename: P P
authors.initials: PP
authors.lastname: Hujoel
authors.forename: M
authors.initials: M
authors.lastname: Drangsholt
authors.forename: C
authors.initials: C
authors.lastname: Spiekerman
authors.forename: T A
authors.initials: TA
authors.lastname: DeRouen
mesh_terms: D015982:Bias; D015984:Causality; D015986:Confounding Factors, Epidemiologic; D003327:Coronary Disease / Q000453:epidemiology; D004194:Disease; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology; D015233:Models, Statistical; D010518:Periodontitis / Q000453:epidemiology*; D029424:Pulmonary Disease, Chronic Obstructive / Q000453:epidemiology; D018570:Risk Assessment / Q000706:statistics & numerical data; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology*; D016540:Smoking Cessation / Q000706:statistics & numerical data; D020521:Stroke / Q000453:epidemiology; D014081:Tooth Extraction / Q000706:statistics & numerical data