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Masao Koyama
Department of Gerostomatology, Tokyo Metropolitan Geriatric Hospital
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Naoyoshi Ishiyama
Department of Gerostomatology, Tokyo Metropolitan Geriatric Hospital
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Ikuma Watanabe
Department of Gerostomatology, Tokyo Metropolitan Geriatric Hospital
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Toru Satou
The Second Department of Prosthetic Dentistry, Tokyo Dental College
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Yoshimi Koshihara
The Second Department of Prosthetic Dentistry, Tokyo Dental College
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Masayoshi Makino
LOTTE Central Laboratory