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*Jung Mi hwa
Department of Periodontology, School of Dentistry, Kyungbook National University, Korea
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Jung Hyun yub
Department of Periodontology, School of Dentistry, Kyungbook National University, Korea
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Yang Won suk
Department of Periodontology, School of Dentistry, Kyungbook National University, Korea
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Park Jin woo
Department of Periodontology, School of Dentistry, Kyungbook National University, Korea
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Suh Jo young
Department of Periodontology, School of Dentistry, Kyungbook National University, Korea
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Lee Jae mok
Department of Periodontology, School of Dentistry, Kyungbook National University, Korea
