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AKIRA NAKAHARA
Department of Gastroenterology, The university of Tsukuba.
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YASUHIRO TAKASE
Department of Gastroenterology, The university of Tsukuba.
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KEIJI TSUKADA
Department of Gastroenterology, The university of Tsukuba.
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KAZUO ORII
Department of Gastroenterology, The university of Tsukuba.
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ISAO KAWAKITA
Department of Gastroenterology, The university of Tsukuba.
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HISAYUKI FUKUTOMI
Department of Gastroenterology, The university of Tsukuba.
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TAKAO SAKITA
Department of Gastroenterology, The university of Tsukuba.
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DAISUKE KATO
Electrotechnical laboratory, The Agency of Industrial Science and Technology.
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KENJIRO SAKURAI
Electrotechnical laboratory, The Agency of Industrial Science and Technology.