Finley, Christian Empyema: an increasing concern in Canada. [electronic resource] - Canadian respiratory journal Mar 2008 - 85-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1198-2241 Standard No.: 10.1155/2008/975312 doi Subjects--Topical Terms: AdultAge DistributionCanada--epidemiologyEmpyema, Pleural--epidemiologyFemaleHumansMaleMiddle AgedMorbidity--trendsPrognosisRetrospective StudiesRisk FactorsSex Distribution