Sachdeva, Payasvi Baweja, Jusmita Dutta, Sheloj Joshi, and Shweta Anand. “Impact of Serum Vitamin D Level on Severity of Asthma in Children”. International Journal of Research in Medical Sciences 9, no. 5 (April 28, 2021): 1454–1457. Accessed October 14, 2025. https://www.msjonline.org/index.php/ijrms/article/view/9477.