1. Laboratory of Histophysiology, Department of Bioresource Science; Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku; Kobe Hyogo 657-8501 Japan
2. Department of Anatomy; Tokyo Medical University, 6-1-1 Shinjuku; Shinjuku-ku Tokyo 160-8042 Japan
3. Center for Collaborative Research and Technology Development; Kobe University, 1-1 Rokkodai-cho, Nada-ku; Kobe Hyogo 657-8501 Japan
4. Research Unit for Future Creation & Innovation “Creative Dojo”, Graduate School of Engineering; Kobe University, 1-1 Rokkodai-cho, Nada-ku; Kobe Hyogo 657-8501 Japan
5. Laboratory of Animal Molecular Morphology, Department of Bioresource Science; Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku; Kobe Hyogo 657-8501 Japan