[On the frequency of various blood groups in patients with ulcers of the stomach and duodenum].
D000017:ABO Blood-Group System; D004381:Duodenal Ulcer / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D013276:Stomach Ulcer / Q000097:blood*
D000017:ABO Blood-Group System
O chastote razlichnykh grupp krovi u lits s iazennoĭ bolezn'iu zheludka i dvenadtsatiperstnoĭ kishki.