Shishira L, Heera Ramesh and Sachin Somashekhar (2022) “A Descriptive Study of Serum Levels of 25-hydroxyvitamin D in Chronic Urticaria and its Association with Disease Activity”, International Journal of Health and Clinical Research, 5(2), pp. 415–417. Available at: https://www.ijhcr.com/index.php/ijhcr/article/view/4237 (Accessed: 7April2026).