scientific article
author: Nobuyuki Hamajima, Michiaki Kubo, Kenji Wakai, Mariko Naito, Tanvir Turin, Asahi Hishida, Rieko Okada, Sadao Suzuki, Haruo Mikami, Satoyo Hosono, Hinako Nanri, Kazuyo Kuwabara, Kokichi Arisawa, Isao Watanabe
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