Ali Fazel, P., K. ullah Makki, H. . Haroon, and S. Sheikh. “Sjogren’s Syndrome”. Journal of the Dow University of Health Sciences (JDUHS), vol. 1, no. 1, Apr. 2007, pp. 34-35, https://jduhs.jduhs.duhs.edu.pk/index.php/jduhs/article/view/1568.