[Epidemiology of peptic ulcer].
D000367:Age Factors; D002980:Climate; D006801:Humans; D008019:Life Style; D009752:Nutritional Status; D009790:Occupations; D010437:Peptic Ulcer / Q000453:epidemiology* / Q000401:mortality; D014586:USSR; D014505:Urban Population
Epidemiologiia iazvennoĭ bolezni.