1. Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Hyogo, Japan
2. Department of Anatomy, Division of Histology and Cell Biology, School of Medicine, Jichi Medical University, Tochigi, Japan
3. Bio 3D Promotion Group, Application Management Department, JEOL Ltd., Tokyo, Japan
4. Laboratory of Animal Molecular Morphology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Hyogo, Japan