RT Journal Article SR Electronic T1 Combining dietary fibres to reduce intestinal gas production in patients with IBS JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP gutjnl-2021-325618 DO 10.1136/gutjnl-2021-325618 A1 Kristin Verbeke YR 2021 UL http://gut.bmj.com/content/early/2021/09/23/gutjnl-2021-325618.abstract AB