MedicineInternal MedicinePulmonary Function TestingPulmonologyAirway ObstructionChronic Obstructive Pulmonary DiseaseObstructive Lung DiseasePulmonary AssessmentPulmonary Function AssessmentRespiratory DiseaseChronic Obstructive Pulmonary Disease AssessmentChronic Obstructive Pulmonary Disease PathophysiologyLung DiseasesPulmonary Obstruction Assessment
1.1. Background This project, to update the position papers on chronic obstructive pulmonary disease (COPD) published by the American Thoracic Society (ATS) and the European Respiratory Society (ERS) in 1995 [1, 2], is sponsored by both societies, who have agreed to develop a document