* R. Fiocca; Luinetti; L. Villani; A. Chiaravalli; M. Cornaggia; G. Stella; M. Perego; E. Trespi, "Solcia E. High incidence of Helicobacter pylori colonization in early gastric cancer and the possible relationship to carcinogenesis". Eur J Gastroenterol Hepatol, 1993.