title: Possible relationship between nitrate in drinking water and incidence of stomach cancer.
mesh_terms: D006801:Humans; D006814:Hungary; D009566:Nitrates / Q000009:adverse effects* / Q000032:analysis / Q000652:urine; D013274:Stomach Neoplasms / Q000139:chemically induced*; D014881:Water Supply / Q000032:analysis*
chemical_list: D009566:Nitrates