PEPTIC ULCER.
D004381:Duodenal Ulcer; D005743:Gastrectomy; D010437:Peptic Ulcer; D010438:Peptic Ulcer Hemorrhage; D010439:Peptic Ulcer Perforation; D013276:Stomach Ulcer
DUODENAL ULCER; GASTRECTOMY; PEPTIC ULCER HEMORRHAGE; PEPTIC ULCER PERFORATION; STOMACH ULCER