21. Therapeutic endoscopy is considered the mainstay of urgent treatment. 22. GVO is usually performed in specialized therapeutic endoscopy centers. 23. The trust also provides a nationwide endoscopy training service. 24. This device must be placed using endoscopy , however. 25. A positive gFOBT with subsequent negative colonoscopy may lead to an upper endoscopy . 26. It is unclear if capsule endoscopy can replace gastroscopy in those with cirrhosis. 27. In 2008 a ?00, 000 endoscopy suite opened. 28. Cancer Research UK claims similar problems exist with other diagnostic services like endoscopies . 29. Carey taught Nwokolo endoscopy of the stomach and duodenum and other medical procedures. 30. The company's chief business is in importing flexible endoscopy accessories from Germany.