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机构:
Tokyo Metropolitan Inst Geriatr & Gerontol, Tokyo, Japan
Hokkaido Univ, Grad Sch Dent Med, Dept Oral Hlth Sci, Div Prevent Dent, Hokkaido, Japan
Hokkaido Univ, Grad Sch Dent Med, Dept Oral Hlth Sci, Div Prevent Dent, Kita 13,Nishi 7,Kita Ku, Sapporo, Hokkaido, Japan Tokyo Metropolitan Inst Geriatr & Gerontol, Tokyo, Japan