Therapeutic endoscopy in the 1990s: objectivity, teaching, and service.
Cotton
P B
PB
D016145:Endoscopy, Digestive System / Q000639:trends*; D016099:Endoscopy, Gastrointestinal / Q000639:trends*; D005762:Gastroenterology / Q000193:education; D006801:Humans; D013663:Teaching / Q000639:trends*