RT Journal Article SR Electronic T1 Does old age cause abdominal pain? JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 500 OP 500 DO 10.1136/gut.2008.166975 VO 58 IS 4 A1 Schiller, D A1 Gschwendtner, M A1 Schöfl, R YR 2009 UL http://gut.bmj.com/content/58/4/500.abstract AB