1. Department of Anatomy I, Fujita Health University School of Medicine, Toyoake 470-1192
2. Department of Histology and Cell Biology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima 734-8551
3. Biosignal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi 371-8512
4. Department of Biochemistry, Fukui Medical University, Matsuoka 910-1193
5. Department of Anatomy and Molecular Cell Biology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan