A., Amitha T., Lekshmi G. S., and Jyothi Roy. “An Analysis of Vitamin D Levels and the Factors Affecting Vitamin D Levels Among the Adult Population Attending a Tertiary Care Hospital”. International Journal of Research in Medical Sciences 10, no. 3 (February 25, 2022): 660–665. Accessed October 14, 2025. https://www.msjonline.org/index.php/ijrms/article/view/10421.