[On the incidence of perforated ulcers of the stomach and duodenum].
N S
NS
EPIFANOV
D001699:Biometry; D004386:Duodenum; D006801:Humans; D015994:Incidence; D010439:Peptic Ulcer Perforation / Q000706:statistics & numerical data*; D014456:Ulcer
PEPTIC ULCER PERFORATION/statistics