Chinju Antony 2020. Comparison of the effectiveness of inhaled short-acting ?2 agonist and anti-cholinergic with and without inhaled corticosteroid in improving the pulmonary function in COPD patients. International Journal of Allied Medical Sciences and Clinical Research. 6, 4 (Aug. 2020), 902–913. DOI:https://doi.org/10.61096/ijamscr.v6.iss4.2018.902-913.