title: Letter: Model for gastric cancer epidemiology.
mesh_terms: D000017:ABO Blood-Group System; D005753:Gastric Mucosa / Q000378:metabolism; D006801:Humans; D011134:Polysaccharides / Q000378:metabolism; D013274:Stomach Neoplasms / Q000209:etiology*
chemical_list: D000017:ABO Blood-Group System; D011134:Polysaccharides