[Blood groups and peptic ulcer].
D000017:ABO Blood-Group System; D000293:Adolescent; D000328:Adult; D000368:Aged; D001789:Blood Group Antigens; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000097:blood*
D000017:ABO Blood-Group System; D001789:Blood Group Antigens
Gruppy krovi i iazvennaia bolezn.