Baseline characteristics of the included studies.
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a: If positive/negative serosal data were provided in original articles, the data were extracted directly. If the depth of invasion was not listed in a paper, T4 + T3 / T1 + T2 (published before 2009) or T4 /T1 + T2 + T3 (published after 2009; T3 and T4 stages were redefined in 2009 UICC TNM stage classification for gastric cancer) were alternatively used. b: Retrospective research. c: Prospective research. OS: overall survival; DSS: disease-specific survival; DFS: disease-free survival; NA: not available. Baseline characteristics of the included studies.
创建时间：
2015-04-16
