RT Journal Article SR Electronic T1 The gut microbiota, dietary extremes and exercise JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1838 OP 1839 DO 10.1136/gutjnl-2014-307305 VO 63 IS 12 A1 Hold, Georgina L YR 2014 UL http://gut.bmj.com/content/63/12/1838.abstract AB