The reception of new operations.
D004947:Esophagus / Q000601:surgery; D005743:Gastrectomy / Q000266:history; D005762:Gastroenterology / Q000266:history*; D005763:Gastroenterostomy / Q000266:history; D013502:General Surgery / Q000266:history*; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007081:Ileostomy / Q000266:history; D010506:Periodicals as Topic / Q000266:history; D011634:Public Health; D011640:Public Policy; D014481:United States