[Diagnosis and treatment of masked perforated gastroduodenal ulcers].
D004381:Duodenal Ulcer / Q000175:diagnosis*; D006801:Humans; D010439:Peptic Ulcer Perforation / Q000175:diagnosis*; D013276:Stomach Ulcer / Q000175:diagnosis*
Diagnostika i lechenie prikrytykh perforativnykh gastroduodenal'nykh iazv.