Correia, A M An outbreak of legionnaires disease in a municipality in northern Portugal. [electronic resource] - Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin Jul 2001 - 121-4 p. digital Publication Type: Journal Article ISSN: 1560-7917 Subjects--Topical Terms: AdultAgedAnalysis of VarianceCase-Control StudiesDisease OutbreaksHumansLegionella pneumophila--isolation & purificationLegionnaires' Disease--epidemiologyMiddle AgedOdds RatioPortugal--epidemiology