. 2023 Jul 25;11(7):663–689. doi: 10.1002/ueg2.12443
© 2023 The Authors. United European Gastroenterology Journal published by Wiley Periodicals LLC on behalf of United European Gastroenterology.
This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
FIGURE 1.
Preferred Reporting Items for Systematic Reviews (PRISMA) flow diagram.