1. Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
2. Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
3. Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University, Tochigi, Japan
4. Division of Ultrastructural Research, National Institute for Physiological Sciences, Aichi, Japan