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Gastric cancer trends for age groups in Iran without adjusting for risk factors during 2005–2010, without adjusting for risk factors (a) Group 1= less than 25-year-old; (b) Group 4= 45–54-year-old; (c) Group 5= 55–64-year-old; (d) Group 6= older than 64-year-old; temporal trends = temporal trend; <1= decreasing trend, 1= fixed trend, >1= increasing trend
