Prognostic Value of the Mannheim Peritonitis Index in Predicting Mortality Following Emergency Surgery for Hollow Viscus Perforation. - Dang, Hong Quan; Nguyen, Van Bi; Cao, Quoc Viet; Duong, Hoai Thuong; Cao, Thuong Tri; La, Van Phu (Journal of Emergencies, Trauma & Shock, 2026)