Study inclusion and exclusion

YZ Yu Zhang
JW Jing-Zhai Wang
XB Xuan Bai
PZ Peng-Li Zhang
QG Qiang Guo
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Literature reviews, letters, meeting abstracts, case reports were not included. In addition, duplicated data records were also excluded. In all included studies, the diagnosis of H. pylori active infection under LCI endoscopy was eventually determined by rapid urease test which is the most common test for diagnosis of H. pylori infection. There were no restrictions in terms of the age or sex of study participants.

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