RT Journal Article SR Electronic T1 Race-specific differences in mucosal sulfidogenic bacteria modify colon cancer risk JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP gutjnl-2017-313989 DO 10.1136/gutjnl-2017-313989 A1 James Kinross YR 2017 UL http://gut.bmj.com/content/early/2017/03/20/gutjnl-2017-313989.abstract AB