High prevalence of cytotoxin positive Helicobacter pylori in patients unrelated to the presence of peptic ulcers in Japan
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Y. Shiratori | K. Lan | T. Kawabe | M. Omata | F. Kanai | H. Yoshida | S. Maeda | K. Ogura | K. Hirota | M. Ogura | Hideo Yoshida | Keiji Ogura | Masao Omata | Y. Shiratori | Shin Maeda