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Type of metachronous double primary cancera) in gastric cancer patients according to sexb)
Values are presented as number (%). a)Sex distribution of metachronous double primary cancer: p<0.001, b)Observed/expected (O/E) ratio was significantly different compared with single primary cancer (O/E ratio: male colorectal, 1.25; male biliary, 1.60; ovary, 8.72; cervix, 3.33).
