Fatima, S., T. . Zubair, S. Sahab, S. Veerwani, K. Mohanlal, B. F. Zuberi, T. Sultana, U. Ahmed, and J. Ahmed. “Comparison of Frequency of Depression Among Patients and Their Healthy Attendants at Medical Out-Patient Department of Civil Hospital Karachi”. Journal of the Dow University of Health Sciences (JDUHS), vol. 5, no. 3, Dec. 2011, pp. 122-5, https://jduhs.jduhs.duhs.edu.pk/index.php/jduhs/article/view/1491.