title: [Pathogenesis of pneumoperitoneum in 22 cases of gastric and duodenal perforation].
authors.forename: H
authors.initials: H
authors.lastname: WOLFF
mesh_terms: D004381:Duodenal Ulcer; D006801:Humans; D010437:Peptic Ulcer / Q000150:complications*; D010439:Peptic Ulcer Perforation; D011014:Pneumonia; D011024:Pneumonia, Viral / Q000209:etiology*; D011027:Pneumoperitoneum
vernacular_title: Beobachtungen über die Entstehung des Pneumoperitoneums bei 22 Fällen von Magen-Darm-Perforationen.