title: Letter: Chemical factors in aetiology of duodenal ulcer.
mesh_terms: D000818:Animals; D002617:Chemical Industry; D004381:Duodenal Ulcer / Q000139:chemically induced*; D006801:Humans; D009784:Occupational Diseases / Q000139:chemically induced; D011422:Propionates / Q000009:adverse effects; D051381:Rats; D014753:Vinyl Compounds
chemical_list: D011422:Propionates; D014753:Vinyl Compounds