title: Surgical endoscopy and sonography. Surgery at the crossroads.
authors.affiliation: II. Chirurgischer Lehrstuhl, Universität zu Köln, Städtisches Krankenhaus Köln-Merheim, Federal Republic of Germany.
authors.forename: H
authors.initials: H
authors.lastname: Troidl
mesh_terms: D004724:Endoscopy / Q000266:history / Q000639:trends*; D013502:General Surgery / Q000266:history / Q000639:trends*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011044:Poland; D014463:Ultrasonography / Q000639:trends*