[Nosocomial infections of the lower airways: the risk factors in COBP].
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Unità Operativa Autonoma di Pneumologia, Ospedale Silvestrini, Azienda Ospedaliera, Perugia.
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D000368:Aged; D001996:Bronchopneumonia / Q000150:complications* / Q000276:immunology; D002908:Chronic Disease; D003428:Cross Infection / Q000209:etiology* / Q000276:immunology; D006801:Humans; D012141:Respiratory Tract Infections / Q000209:etiology* / Q000276:immunology; D012307:Risk Factors