Parambil, Sasi M., Siddharth Matad, and Soman K. C. 2017. “Epidemiological, Demographic and Risk Factor Profile in Patients Harbouring Various Types of Gallbladder Calculi: A Cross Sectional Study from a South Indian Tertiary Care Hospital”. International Surgery Journal 4 (2):525-28. https://doi.org/10.18203/2349-2902.isj20164794.