Ahmed Memon, Ashfaq, Muhammad Ayaz Mustufa, and Muhammad Ashfaq. “Frequency of Smoking Among Employees at a Tertiary Care Children Hospital, Karachi”. Journal of the Dow University of Health Sciences (JDUHS) 4, no. 1 (April 12, 2010): 43–46. Accessed April 28, 2024. https://jduhs.com/index.php/jduhs/article/view/1293.