RT Journal Article SR Electronic T1 Medical Aspects of Dietary Fiber JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 615 OP 615 DO 10.1136/gut.22.7.615 VO 22 IS 7 A1 Chadwick, V YR 1981 UL http://gut.bmj.com/content/22/7/615.1.abstract AB