1. Laboratory of Anatomy, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan,
2. R&D Department, Daiichi Sankyo Healthcare Co., Ltd., Tokyo, Japan,
3. Department of Anatomy, Research Institute of Medical Science, Konkuk University School of Medicine, Seoul, Republic of Korea,
4. Section of Biological Safety Research, Chitose Laboratory, Japan Food Research Laboratories, Chitose, Japan,
5. Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University, Nankoku, Japan, and
6. Department of Histology and Cytology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt