Peptic ulcer--its association with ABO blood groups, secretor status and smoking habits.
D000017:ABO Blood-Group System; D000328:Adult; D001789:Blood Group Antigens; D005260:Female; D005750:Gastric Juice / Q000378:metabolism*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology*; D012907:Smoking / Q000150:complications*
D000017:ABO Blood-Group System; D001789:Blood Group Antigens