GastroenterologyI. Upper Gi disease. Esophageal motility disorder . GERD . Various esophagitis . Gastropathy and gastritis . Helicobacter pylori . Peptic ulcer disease (PUD) . NSAID induced gastrointestinal damage . Gastric polyps . 위선종과 조기위암의 내시경 치료 . Gastrointestinal bleeding II. Lower GI disease. Constipation의 진단과 치료 . Diarrhea . Ischemic diseases of the bowel . Infectious gastroenteritis . Inflammatory bowel diseases . Intestinal tuberculosis . Colonic diverticula . ...