. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: Gastroenterology. 2019 Dec 6;158(3):732–744.e16. doi: 10.1053/j.gastro.2019.12.002
This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Figure 1.
PRISMA flow diagram of study selection.