RT Journal Article SR Electronic T1 Acute pancreatitis reclassified JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 4 OP 5 DO 10.1136/gutjnl-2012-303725 VO 62 IS 1 A1 Windsor, John A A1 Petrov, Maxim S YR 2013 UL http://gut.bmj.com/content/62/1/4.abstract AB