RT Journal Article SR Electronic T1 Dysphagia: revisiting investigations JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP gutjnl-2021-324844 DO 10.1136/gutjnl-2021-324844 A1 Yong Sul Kim A1 Ross Hansen A1 May YW Wong YR 2021 UL http://gut.bmj.com/content/early/2021/07/13/gutjnl-2021-324844.abstract AB