scientific article
author: Kazuhiko Arima, Hiroyuki Mishima, Nobuo Kanazawa, Tsunehiro Mizushima, Kunihiro Ichinose, Shigeo Murata, Norio Niikawa, Akira Kinoshita, Koh-ichiro Yoshiura, Akira Tsujino, Katsumi Eguchi, Shunichi Kumagai
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