[Peptic ulcer. Influence of heredity and environment. Gastroduodenal ulcer in twins].
D004194:Disease; D004200:Diseases in Twins; D004777:Environment; D040941:Heredity; D006801:Humans; D010437:Peptic Ulcer / Q000209:etiology*; D014427:Twins
PEPTIC ULCER/etiology; TWINS/diseases