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DOI: https://doi.org/10.3340/jkns.2015.58.3.301

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DOI: https://doi.org/10.3340/jkns.2015.58.3.167

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DOI: https://doi.org/10.3340/jkns.2009.46.3.210

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DOI: https://doi.org/10.3340/jkns.2009.46.2.87

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