RT Journal Article SR Electronic T1 Antibiotic use and colorectal cancer: a causal association? JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1913 OP 1914 DO 10.1136/gutjnl-2019-319792 VO 69 IS 11 A1 Wenjie Ma A1 Andrew T Chan YR 2020 UL http://gut.bmj.com/content/69/11/1913.abstract AB