[Research on the frequency of association of gastroduodenal ulcer with cholelithiasis].
D000328:Adult; D000368:Aged; D002769:Cholelithiasis / Q000150:complications*; D004381:Duodenal Ulcer / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013276:Stomach Ulcer / Q000150:complications*
Ricerche sulla frequenza di associazione dell'ulcera gastroduodenale con la colelitiasi.