Zahid Hussain, M. Arif, Mehwish Akhtar, Farah Khalid. Peak Expiratory Flow Rate Versus Acapella on Pulmonary Function in Elderly Post-Covid-19 Patients. JHRR [Internet]. 2025 Jun. 30 [cited 2026 Mar. 5];5(6):1-7. Available from: https://jhrlmc.com/index.php/home/article/view/1923