2.1 | Data sources and search strategy
We systematically searched PubMed, Embase, Web of Science, and the
Cochrane Library for studies that assessed the diagnostic accuracy of
RAC for H. pylori infection. Our medical subject heading terms (for
PubMed), EMTREE terms (for Embase), and search text (for others) were
”(”Kyoto classification of gastritis” OR ”endoscopic findings” OR
(endoscopic features) OR ”regular arrangement of collecting venules” OR
RAC) AND (”Helicobacter pylori” OR H. pylori).” The detailed search
strategy is shown in Supplementary Table 1 . We searched the
databases between inception and Oct 29, 2020. The reference list of each
primary study identified was also searched.