The Effect of Pursed Lips Breathing Exercises and Diafragma Breathing on Spirometry and Modified Medical Research Council Scale on Stable Chronic Obstruction Lung Disease. J Respirol Indones [Internet]. 2021 Apr. 30 [cited 2025 Aug. 19];41(2):80-6. Available from: http://www.jurnalrespirologi.org/index.php/jri/article/view/174