RT Journal Article SR Electronic T1 Competing at the top level with Crohn’s disease JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP bjsports-2019-100807 DO 10.1136/bjsports-2019-100807 A1 Alyx Treasure YR 2019 UL http://bjsm.bmj.com/content/early/2019/07/05/bjsports-2019-100807.abstract AB