Preferred Reporting Items for Systematic Review and Meta-Analysis diagram of studies evaluating patients with SAP and with AP before reclassification. Preferred Reporting Items for Systematic Review and Meta-Analysis diagram of studies evaluating patients with SAP and with AP before reclassification. AP, acute pancreatitis; HRQoL, health-related quality of life; SAP, severe acute pancreatitis; SLR, systematic literature review. Grammati Sarri et al. BMJ Open Gastroenterol 2019;6:e000248 © Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.