Patel, J. K., H. K. Mahur, S. S. Jat, and D. P. Singh. “A Study of the Correlation of Serum Vitamin D Levels to Child-Pugh and MELD-Na Scoring System in Cirrhosis of the Liver”. International Journal of Research in Medical Sciences, vol. 9, no. 1, Dec. 2020, pp. 210-5, doi:10.18203/2320-6012.ijrms20205846.