[1] Kansai Denryoku Hosp, Dept Internal Med 1, Fukushima Ku, Osaka 5530003, Japan
[2] Kansai Denryoku Hosp, Dept Internal Med 2, Fukushima Ku, Osaka 5530003, Japan
[3] Hoshida Minami Hosp, Dept Internal Med, Osaka, Japan
[4] Ehime Univ, Dept Physiol 1, Matsuyama, Ehime 790, Japan
[5] Kyoto Univ, Coll Med Technol, Dept Internal Med 2, Kyoto 606, Japan
[6] Kyoto Univ, Coll Med Technol, Div Sci Nursing, Kyoto 606, Japan
[7] Univ Tsukuba, Inst Hlth & Sport Sci, Lab Biochem Exercise & Nutr, Tsukuba, Ibaraki 305, Japan