Butt, G., F. Altaf, U. Wazir, and S. S. Pal. “Familial Frequency of Vitiligo and Its Association With Autoimmune Disorders”. Journal of Pakistan Association of Dermatologists, vol. 25, no. 2, Nov. 2016, pp. 101-4, https://www.jpad.com.pk/index.php/jpad/article/view/90.