[1]
G. Hussain, S. Zafar, A. A. Chaudhary, Z. A. Chaudhary, and M. Z. Ahmad, “Comparative Study of Peak Expiratory Flow Rate in Cigarette Smokers and Non-Smokers of Lahore District”, Annals KEMU, vol. 13, no. 4, p. 255, Feb. 2010.