2) Konno M, et al: Five-year follow-up study of mother-to-child transmission of Helicobacter pylori infection detected by a random amplified polymorphic DNA fingerprinting method. J Clin Microbiol 43: 2246-2250, 2005.
3) Okuda M, et al: Helicobacter pylori colonization in the first 3 years of life in Japanese children. Helicobacter 12: 324-327, 2007.