Mashaal Rana, Muhammad Iqbal Tariq, Anayatullah Syed, Uffaq Zeb, Farrakh Tariq, Aqsa Tahir 2022. Effects of Pursed Lip Breathing with Arm Ergometry after Chin Support Position in Copd Patients. Pakistan Journal of Medical & Health Sciences. 16, 09 (Nov. 2022), 485. DOI:https://doi.org/10.53350/pjmhs22169485.