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4
by Sakai, A.
Published in Gerontechnology (2005)
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5
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6
by Sakai, T.
Published in Seibutsu Butsuri (2005)
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7
by Sakai, T.
Published in Seibutsu Butsuri (2004)
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10
12
14
by Sakai, T.
Published in Seibutsu Butsuri (1999)
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15
by Sakai, T.
Published in SANGYO EISEIGAKU ZASSHI (1999)
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16
17
by Sakai, T.
Published in SANGYO EISEIGAKU ZASSHI (1998)
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19