Gong, H Responses of older men with and without chronic obstructive pulmonary disease to prolonged ozone exposure. [electronic resource] - Archives of environmental health - 18-25 p. digital Publication Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't ISSN: 0003-9896 Standard No.: 10.1080/00039899709603795 doi Subjects--Topical Terms: AgedAir Pollutants--adverse effectsAnalysis of VarianceAtmosphere Exposure ChambersExerciseHumansLung--drug effectsLung Diseases, Obstructive--physiopathologyMaleMiddle AgedOxidants, Photochemical--adverse effectsOxygen--bloodOzone--adverse effectsRespiratory Function TestsSurveys and Questionnaires