1. Department of Molecular Genetics, Division of Molecular and Clinical Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
2. Department of Biomedical Science, Central Institute for Experimental Animals, Kawasaki, Kanagawa, Japan
3. Cell Bank, RIKEN BioResource Center, Tsukuba, Ibaraki, Japan
4. Division of Molecular Therapy, Institute of Medical Science, University of Tokyo, Tokyo, Japan