Mudavath, S. R., A. Chintaginjala, R. D.V.S.B, S. K, S. AL, and S. Kameti. “Evaluation of Serum 25 Hydroxy Vitamin D Levels in Patients With Chronic Spontaneous Urticaria: A Hospital Based Cross Sectional Study in a Tertiary Care Centre”. Journal of Pakistan Association of Dermatologists, vol. 29, no. 3, Oct. 2019, pp. 289-93, https://www.jpad.com.pk/index.php/jpad/article/view/1331.