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Kaori Sakai, Yukio Ozaki, Kenji Ureshino, Ikuo Miyajima, Akira Wakana, Hiroshi Okubo
Pág. 268 - 274
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Azusa Sato, Hiroshi Okubo, and Kazuyuki Saitou
Pág. 185 - 191
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Hirokazu Okada,Seiichi Muneki,Katsumi Yamada,Hiroshi Okubo,Masaaki Igarashi and Fujio Abe
Pág. 1169 - 1174
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Huang, Kuang-Liang; Miyajima, Ikuo; Okubo, Hiroshi; Shen, Tsai-Mu; H
Pág. 235 - 241
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