title: [Incidence of clinical aspects of ulcer disease in certain occupational groups].
mesh_terms: D002031:Bulgaria; D004035:Diet Therapy; D005260:Female; D006471:Gastrointestinal Hemorrhage; D006801:Humans; D008297:Male; D009784:Occupational Diseases / Q000453:epidemiology*; D009790:Occupations; D010437:Peptic Ulcer / Q000150:complications / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy
vernacular_title: Prouchvane vurkhu chestotata i klinikata na iazvenata bolest pri niakoi profesionalni grupi