Bima Aminul Karim. Respiratory muscle stretch gymnastics (RMSG) and pursed lip breathing exercise (PLB) on increasing forced expiratory volume 1 (FEV1) on patients of chronic obstructive pulmonary disease . ijamscr [Internet]. 2020 Aug. 24 [cited 2024 May 3];8(3):547-5. Available from: https://ijamscr.com/ijamscr/article/view/893