2) Samloff IM, Varis K, Ihamaki T, et al: Relationship among serum pepsinogen and gastric mucosal histology; A study inrelatives of patients with pernicious anemia. Gastroenterology: 1982, 83: 204-209.
5) International Agency for Research on Cancer. Schistosomes, liver flukes and Helicobacter pylori. IARC Monogr Eval Carcinog Risks Hum: 1994, 61: 177-240.