ABO blood group, secretor status and gastric secretion.
D000017:ABO Blood-Group System; D000328:Adult; D004381:Duodenal Ulcer / Q000453:epidemiology; D005745:Gastric Acidity Determination; D005750:Gastric Juice; D006801:Humans; D008297:Male; D010434:Pepsin A / Q000502:physiology*; D012463:Saliva / Q000032:analysis*; D012636:Secretory Rate; D013274:Stomach Neoplasms / Q000453:epidemiology
D000017:ABO Blood-Group System; D010434:Pepsin A