Duodenal ulcer in one of identical twins.
D004194:Disease; D004200:Diseases in Twins; D004381:Duodenal Ulcer; D006801:Humans; D010437:Peptic Ulcer / Q000523:psychology*; D014427:Twins; D014430:Twins, Monozygotic
PEPTIC ULCER/psychology; TWINS/diseases