[1] Kagawa Nutr Univ, Kagawa, Saitama, Japan
[2] Res Inst & Practice Involut Dis, Nagano, Japan
[3] Japan Womens Univ, Tokyo 112, Japan
[4] Tokyo Univ Agr, Tokyo, Japan
[5] Univ Tokyo, Tokyo, Japan
[6] Tokyo Metropolitan Geriatr Hosp, Tokyo 173, Japan