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Gastric cancer is one of the most prevalent cancers worldwide, ranking fourth after lung, breast and colorectal cancers, and it is the second cause of cancer death. The majority of cases occur in developing countries and are more common in males, irrespective of age and geographic area. In Portugal it ranks fifth in cancer deaths and its incidence is the highest in Western Europe.
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Areia et al. (2013) studied this question.
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