New clinical procedures in endoscopy of the digestive tract.
D001706:Biopsy; D004378:Duodenal Diseases / Q000175:diagnosis; D004724:Endoscopy / Q000379:methods*; D004945:Esophagoscopy / Q000379:methods; D005767:Gastrointestinal Diseases / Q000175:diagnosis* / Q000601:surgery; D006801:Humans