RT Journal Article SR Electronic T1 Serum amylase levels and acute pancreatitis. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 429 OP 429 DO 10.1136/gut.34.3.429-a VO 34 IS 3 A1 Gumaste, V YR 1993 UL http://gut.bmj.com/content/34/3/429.2.abstract AB