[Endoscopy in gastroenterology. Current technical aspects].
D004724:Endoscopy; D004945:Esophagoscopy; D005762:Gastroenterology / Q000175:diagnosis*; D005773:Gastroscopy; D006801:Humans; D012812:Sigmoidoscopy
ESOPHAGOSCOPY; GASTROENTEROLOGY/diagnosis; GASTROSCOPY; SIGMOIDOSCOPY