1. Division of Laboratory Animal Science, Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
2. Department of Urology, Urayasu Hospital, Juntendo University, Urayasu, Chiba, Japan
3. Department of Molecular Genetics, Division of Molecular and Clinical Genetics, Medical Institute of Bioregulation, Kyushu University, Hakata, Fukuoka, Japan
4. Tokai University School of Medicine, Isehara, Kanagawa, Japan
5. Department of Physiology, Keio University School of Medicine, Shinjuku‐ku, Tokyo, Japan
6. Research Project Center, Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
7. Department of Genetics, Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
8. Division of Molecular Therapy, Institute of Medical Science, University of Tokyo, Kyoto, Japan
9. Institute of Obstetrics & Gynecology in Clinical Medicine, University of Tsukuba, Kyoto, Japan
10. Laboratory of Embryonic Stem Cell Research, Stem Cell Research Center, Kyoto, Japan
11. Department of Development and Differentiation, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan