[Peptic ulcer among elderly rural population].
D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000453:epidemiology*; D011044:Poland; D012423:Rural Health; D012744:Sex Ratio
Choroba wrzodowa wśród mieszkańców wsi trzeciego wieku.