1. Wayo Konodai Girls' Senior High School, 2-3-1 Konodai, Chiba 272-8533, Japan
2. Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Kojirakawa 1-4-12, Yamagata 990-8560, Japan
3. Medical Research Institute, Kanazawa Medical University, 1-1 Uchinada, Ishikawa 920-0265, Japan