authors Vaz Fragoso, Carlos A McAvay, Gail Van Ness, Peter H Casaburi, Richard Jensen, Robert L MacIntyre, Neil Yaggi, H Klar Thomas M. Gill, MD Concato, John
has subject area Aged Aged, 80 and over Aging Comorbidity Dyspnea Emphysema Exercise Test Female Forced Expiratory Flow Rates Forced Expiratory Volume Humans Lung Male Middle Aged Multicenter Studies as Topic Phenotype Pulmonary Disease, Chronic Obstructive Quality of Life Reference Standards Severity of Illness Index Smoking Spirometry Tomography, X-Ray Computed United States