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. 2014 Nov 10;64(11):1721–1731. doi: 10.1136/gutjnl-2014-308252

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Schematic diagram of study. The study examined a total of nine microarray datasets (total n=1016), comprising cohorts from Asian and non-Asian localities. For the initial assessment (Stage 1), the four Affymetrix-based studies (total n=299) were considered. Stage 2 was a validation study assessing five non-Affymetrix platform studies (total n=717). Further validation was performed on two tissue microarray datasets (total n=665), comprising Caucasian and Japanese patients with gastric cancer.