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Masahiro Ito
Department of Internal Medicine, Nagaoka-Nishi Hospital, Niigata, Japan Nagaoka Sutoku University, Niigata, Japan
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Toshiki Sato
Department of Internal Medicine, Nagaoka-Nishi Hospital, Niigata, Japan
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Tsuneo Nagai
Department of Internal Medicine, Nagaoka-Nishi Hospital, Niigata, Japan