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Harnka Tohara
Seel ion of Gerodontology, Department of Gerodontology, Division of Gerontology and Germ'ontology, Graduate School, Tokyo Medical and Dental University
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Kazuhiro Shimovama
Seclion Of Geriatric Oral Health Care Science, Department of Lifetime Oral Health Care Sciences, School of Oral Health Care Sciences, Faculty Dentistry, Tokyo Medical and Dental Unkersity