1. Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
2. Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
3. Laboratory of Molecular and Cellular Pathology, Hokkaido University Research Center for Zoonosis Control and 21st Century Center of Excellence Program for Zoonosis Control, Kita-ku, Sapporo 060-8638, Japan
4. Department of Immunology and Oncology, National Center for Biotechnology, Centro Nacional de Biotecnología, C/Darwin 3, 28049 Madrid, Spain
5. Department of Developmental Biology, Center for Translational and Advanced Animal Research, Graduate School of Medicine, Tohoku University, Aoba-ku, Sendai 980-8575, Japan