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Esophageal Neoplasms
Squamous Cell Carcinoma
Stomach Neoplasms
Adenocarcinoma
China
Iran
Risk Factors
Incidence
Precancerous Conditions
Prospective Studies
Cohort Studies
Odds Ratio
Risk Assessment
Case Control Studies
Esophagoscopy
Biopsy
Cardia
Esophagus
Smoking
Vitamins
Co-Publications
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