Gastrointestinal endoscopy.
D002983:Clinical Competence; D003406:Credentialing / Q000592:standards*; D004502:Education, Medical, Continuing; D016099:Endoscopy, Gastrointestinal / Q000592:standards*; D005762:Gastroenterology / Q000193:education*; D006801:Humans; D008504:Medical Staff Privileges; D012955:Societies, Medical; D014481:United States