Balaprabha, G., J. Hakeem, K. Sanjana, I. Avanish Reddy, Alekhyamuliki, P. K. Koppula, and T. Rao. “Vitamin D Deficiency and Its Association With Respiratory Tract Infections in Pediatrics: Life Sciences-Pharma”. International Journal of Life Science and Pharma Research, vol. 12, no. 4, July 2022, pp. L37-L45, doi:10.22376/ijpbs/lpr.2022.12.4.L37-45.