1. Department of Veterinary Medicine, Faculty of Agriculture, Iwate University
2. Laboratory of Cytology and Histology, Hokkaido University Graduate School of Medicine
3. Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University
4. Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University
5. Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Technology
6. Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo