Qayyum, Fatima, Sidra Qayyum Malik, Amber Tasnim Qureshi, and Afreen Diju. “Peak Expiratory Flow Rates in Smoker Asthmatics Versus Non-Smoker Asthmatics: A Comparative Analysis”. Pakistan Journal of Physiology 16, no. 4 (December 31, 2020): 10–12. Accessed November 24, 2024. https://pjp.pps.org.pk/index.php/PJP/article/view/1255.