4) Ranson JH, Rifkind KM, Roses DF, Fink SD, Eng K, Spencer FC. Prognostic signs and the role of operative management in acute pancreatitis. Surg Gynecol Obstet 1974 ; 139 : 69-81.
5) Knaus WA, Draper EA, Wagner DP, et al. APACHE II : A severity of disease classification system. Crit Care Med 1985 ; 13 : 818-29.