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Esophageal Neoplasms
Stomach Neoplasms
Squamous Cell Carcinoma
Adenocarcinoma
Helicobacter Infections
Atrophic Gastritis
Risk Factors
Incidence
Cohort Studies
Prospective Studies
Odds Ratio
Risk Assessment
Iran
China
Case Control Studies
Smoking
Questionnaires
Alcohol Drinking
Helicobacter pylori
Pepsinogen A
Co-Publications
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