1. International Agency for Research on Cancer. Schistosomes, liver flukes and Helicobacter pylori. IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. Lyon, 7-14 June 1994. IARC Monogr Eval Carcinog Risks Hum 1994;61:177-241.
2. Sipponen P, Kimura K. Intestinal metaplasia, atrophic gastritis and stomach cancer: trends over time. Eur J Gastroenterol Hepatol 1994;6 Suppl 1:S79-S83.
3. Xia HX, Forman D, Talley NJ. Helicobacter pylori infection and gastric cancer. Helicobacter pylori infection: basic principles and clinical practice Changsha: Hunan Science and Technology Press; 1997;101-108.
4. Palli D. Gastric cancer and Helicobacter pylori: a critical evaluation of the epidemiological evidence. Helicobacter 1997;2 Suppl 1:S50-S55.