[So-called occupational factors in peptic ulcer in workers; preliminary communication].
D016481:Helicobacter Infections; D006801:Humans; D010437:Peptic Ulcer / Q000209:etiology*
PEPTIC ULCER/etiology and pathogenesis
T. zv. pracovnä faktory ve výskytu v6redové choroby u pracujäcäch; p6redbĕ6zné sdĕlenä.