RT Journal Article SR Electronic T1 Impact of pre-procedural testing on SARS-CoV-2 transmission to endoscopy staff JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 2167 OP 2169 DO 10.1136/gutjnl-2022-327053 VO 71 IS 11 A1 Alexander Hann A1 Sven Flemming A1 Stanislaus Reimer A1 Kaja Groneberg A1 Theodor Kudlich A1 Christoph-Thomas Germer A1 Alexander Meining YR 2022 UL http://gut.bmj.com/content/71/11/2167.abstract AB