RT Journal Article SR Electronic T1 Prevention of nosocomial SARS-CoV-2 transmission in endoscopy: international recommendations and the need for a gold standard JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1145 OP 1148 DO 10.1136/gutjnl-2020-321154 VO 69 IS 6 A1 John Ong A1 Gail B Cross A1 Yock Young Dan YR 2020 UL http://gut.bmj.com/content/69/6/1145.abstract AB