RT Journal Article SR Electronic T1 Progress report. Radioimmunoassay of intestinal hormones. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 502 OP 510 DO 10.1136/gut.15.6.502 VO 15 IS 6 A1 S R Bloom YR 1974 UL http://gut.bmj.com/content/15/6/502.abstract AB