13. Johnson CD, Lempinen M, Imrie CW, et al. Urinary trypsinogen activation peptide as a marker of severe acute pancreatitis. Br J Surg. 2004;91(8):1027-1033. 14. Papachristou GI, Whitcomb DC. Inflammatory markers of disease severity in acute pancreatitis. Clin Lab Med. 2005;25(1):17-37. 15. Working Party of the British Society of Gastroenterology; Association of Surgeons of Great Britain and Ireland; Pancreatic Society of Great Britain and Ireland; Association of Upper GI Surgeons of Great Britain and Ireland. UK guidelines for the management of acute pancreatitis. Gut. 2005;54(suppl 3):iii1-iii9. 16. Gardner TB, Vege SS, Pearson RK, Chari ST. Fluid resuscitation in acute pancreatitis. in blood urea nitrogen predict mortality in acute pancreatitis. Gastroenterology. 2009;137(1): 129-135. 18. Singh VK, Wu BU, Bollen TL, et al. A prospective evaluation of the bedside index for severity in acute pancreatitis score in assessing mortality and intermediate markers of severity in acute pancreatitis. Am J Gastroenterol. 2009;104(4):966-971. 19. Besselink MG, van Santvoort HC, Buskens E, et al; Dutch Acute Pancreatitis Study Group. Probiotic prophylaxis in predicted severe acute pancreatitis: a randomised, double-blind, placebo-controlled trial. Lancet. 2008;371(9613):651-659. 20. Besselink MG, van Santvoort HC, Boermeester MA, et al; Dutch Acute Pancreatitis Study Group. Timing and impact of infections in acute pancreatitis. Br J Surg. 2009;96(3):267-273. 21. Papachristou GI, Muddana V, Yadav D, et al. Comparison of BISAP, Ranson's, APACHE-II, and CTSI scores in predicting organ failure, complications, and mortality in acute pancreatitis. Am J Gastroenterol. 2010;105(2):435-441, quiz 442. 22. DeLong ER, DeLong DM, Clarke-Pearson DL. Comparing the areas under two or more correlated receiver operating characteristic curves: a nonparametric approach. Biometrics. 1988;44(3):837-845. 23. Corfield AP, Cooper MJ, Williamson RC, et al. Prediction of severity in acute pancreatitis: prospective comparison of three prognostic indices. Lancet. 1985; 2(8452):403-407. 24. Pooran N, Indaram A, Singh P, Bank S. Cytokines (IL-6, IL-8, TNF): early and reliable predictors of severe acute pancreatitis.