ABO blood groups and gastro-duodenal diseases.
D000017:ABO Blood-Group System; D006801:Humans; D010437:Peptic Ulcer / Q000097:blood*; D013274:Stomach Neoplasms / Q000097:blood*
D000017:ABO Blood-Group System
PEPTIC ULCER/blood in; STOMACH NEOPLASMS/blood in