spirometry results of FEV1/FVC < 70% with FEV1 < 60% predicted with COPD symptoms
spirometry results of fev1/fvc < 70% with fev1 < 60% predicted with copd symptoms
spirometry results of FEV1/FVC < 70% with FEV1 < 60% predicted with COPD symptoms
spirometry results of fev1/fvc < 70% with fev1 < 60% predicted with copd symptoms