1. Department of Biomedicine, Graduate School of Medical Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
2. Laboratory of Veterinary Anatomy, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
3. On-chip Biotechnologies Co., Ltd., 2-24-16 Naka-cho, Koganei, Tokyo 184-0012, Japan
4. Laboratory of Zoology, Graduate School of Agriculture, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
5. Laboratory of Veterinary Developmental Biology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan