High prevalence of cytotoxin positive Helicobacter pylori in patients unrelated to the presence of peptic ulcers in Japan
K Ogura, F Kanai, S Maeda, H Yoshida, M Ogura, K-H Lan, K Hirota, T Kawabe, Y Shiratori, M Omata
Gut Oct 1997, 41 (4) 463-468; DOI: 10.1136/gut.41.4.463