Kumar, P., Singh, K. and Kumar, A. 2017. A comparative study between Mannheim peritonitis index and APACHE II in predicting the outcome in patients of peritonitis due to hollow viscous perforation. International Surgery Journal. 4, 2 (Jan. 2017), 690–696. DOI:https://doi.org/10.18203/2349-2902.isj20170215.