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Yoshio SHÖBL
Dep. of Bacteriology, School of Medicine, Toho University
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Hiroshi SUETSUGI
Dep. of Bacteriology, School of Medicine, Toho University
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Kiyoshi ARAI
Dep. of Bacteriology, School of Medicine, Toho University
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Toyotaro OKAWA
Dep. of Bacteriology, School of Medicine, Toho University