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The autopsy incidence of chronic peptic ulceration, a national and regional survey of 20,000 examinations performed in Leeds, England, between 1930 and 1949 and in 9 towns in England and Scotland in 1956
The autopsy incidence of chronic peptic ulceration, a national and regional survey of 20,000 examinations performed in Leeds, England, between 1930 and 1949 and in 9 towns in England and Scotland in 1956