Bangash, Maj Mussavir Hussian, Syed Badshah Hussain Zaidi, Syed Mohammad Asad Zaidi, and Imran Khan. “USE OF SPIROMETRY IN DETECTING AIRWAY OBSTRUCTION IN ASYMPTOMATIC SMOKERS: Spirometry in Asymptomatic Smokers”. Pakistan Armed Forces Medical Journal 60, no. 3 (September 30, 2010): 368–72. Accessed October 2, 2024. https://pafmj.org/PAFMJ/article/view/1332.