Malsri, D.G.S.; Gordon, L.A.; Wijesiriwardane, V.R.; Perera, G.A.D.
(Faculty of Medicine, University of Kelaniya, Sri Lanka, 2021)
Introduction: A patient with COPD usually indicates a decreased value in Forced Expiratory Volume (FEV1) and Forced Vital Capacity (FVC). For the diagnosis purpose and to identify the severity stage of patients with COPD, ...