1. Laboratory of Analytical and Bio-Analytical Chemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
2. Department of Medicine for Aging Place, Community Health Care/Community-Based Medical Education, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-0001, Japan
3. Department of Neuropathology, Choju Medical Institute, Fukushimura Hospital, Toyohashi 441-8124, Japan
4. Laboratory of Clinical & Analytical Chemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan