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To examine the association between gastric atrophy, Helicobacter pylori and CagA status, and ratio of oesophageal squamous cell carcinoma to oesophageal adenocarcinoma (OSCC:OAC) amongst international heterogeneous populations.Standardised protocols were used to collect and process questionnaire data and serum samples for PgA and PgC levels and H. pylori and CagA serology. The OSCC:OAC were used to...
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