Rao, P. V. P., P. V. Siddhartha, and P. Yeshwante. “Vitamin D Deficiency, the Urban Epidemic: A Cross-Sectional Study from Bhopal, India”. International Journal Of Community Medicine And Public Health, vol. 7, no. 11, Oct. 2020, pp. 4541-6, doi:10.18203/2394-6040.ijcmph20204759.