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Risk factors for esophageal and gastric cancers in Shanxi Province, China: A case–control study

EpidemiologyEsophagusCancer EpidemiologyGastrointestinal OncologyEsophageal CancerMedicineGlobal HealthEpidemiology Of CancerCancer RiskRiskGastric CancersPublic HealthOncologyRisk FactorsCancer ResearchShanxi ProvinceCancer Risk Factors