Shakir, M. M., A. Ali, and N. Azad. “Prevalence of Medical Problems in Dental Out Patients in Karachi”. Journal of the Dow University of Health Sciences (JDUHS), vol. 5, no. 3, Dec. 2011, pp. 99-102, https://jduhs.jduhs.duhs.edu.pk/index.php/jduhs/article/view/1487.