Two reviewers, in pairs and independently, read titles and abstracts to identify preliminarily eligible studies and then read full texts to determine the final inclusions. The following data of the included studies was extracted using a standardized form with a pilot test: title, author, publication year, gender, mean age, stage of gastric cancer, preparation of MTE, regimen of chemotherapy, course of treatment, length of follow-up, and outcome data. Any disagreements were settled by inter-reviewer discussion or consultation with a third reviewer.
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