About the frequency of ulcer ventriculi and ulcer duodeni in a Norwegian urban population.
D001699:Biometry; D010437:Peptic Ulcer / Q000453:epidemiology* / Q000706:statistics & numerical data*
PEPTIC ULCER/epidemiology and statistics
Om hyppigheten av ulcus ventriculi og ulcus duodeni i en norsk bybefolkning.