[Result of investigation of gastric and duodenal ulcer in Bulgaria].
D002031:Bulgaria; D004381:Duodenal Ulcer; D006801:Humans; D010437:Peptic Ulcer / Q000706:statistics & numerical data*
PEPTIC ULCER/statistics
Rezultati ot niakoi prouchvaniia vurkhu iazvenata bolest na stomakha i dvanadesetoprustnika v Bulgariia.