title: Are PubMed alone and English literature only enough for a meta-analysis?
authors: B
authors: B
authors: Zheng
authors: W
authors: W
authors: Zheng
authors: Y
authors: Y
authors: Zhu
authors: C
authors: C
authors: Guo
authors: W
authors: W
authors: Wu
authors: C
authors: C
authors: Chen
mesh_terms: D000230:Adenocarcinoma / Q000453:epidemiology*; D000428:Alcohol Drinking / Q000009:adverse effects*; D004938:Esophageal Neoplasms / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D013274:Stomach Neoplasms / Q000453:epidemiology*