Sajjad, S., S. Munir, S. B. Rahman, N. Saba, and S. Rehman. “VDR Polymorphisms ApaI (rs7975232), TaqI (rs731236) and FokI (rs2228570) in Pakistani Vitiligo Patients and Controls”. Journal of Pakistan Association of Dermatologists, vol. 27, no. 2, July 2018, pp. 102-9, https://www.jpad.com.pk/index.php/jpad/article/view/1074.