1. Department of Animal Breeding and Reproduction, National Institute of Livestock and Grassland Science
2. Laboratory of Reproductive Endocrinology, Graduate School of Natural Science and Technology, Okayama University
3. Department of Immunology, National Institute of Animal Health
4. Department of Animal and Grassland Research, National Agricultural Center for Kyushu Okinawa Region
5. Department of Animal Production and Grasslands Farming, National Agricultural Center for Tohoku Region