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Katsuyuki Ando
Department of Intemal Medicine, Institute of Clinical Medicine, University of Tsukuba
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Hiroshi Noda
Department of Intemal Medicine, Institute of Clinical Medicine, University of Tsukuba
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Yasushi Ito
Department of Intemal Medicine, Institute of Clinical Medicine, University of Tsukuba
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Toshiro Fujita
Department of Intemal Medicine, Institute of Clinical Medicine, University of Tsukuba