Gastrointestinal endoscopy.
D002983:Clinical Competence; D003406:Credentialing / Q000592:standards*; D004501:Education, Medical; D016099:Endoscopy, Gastrointestinal; D006801:Humans; D007396:Internship and Residency; D008504:Medical Staff Privileges / Q000592:standards*; D014481:United States