1. Department of Medicine and Bioregulatory Sciences; University of Tokushima Graduate School of Medical Sciences; Tokushima Japan
2. Department of Developmental Biology of Hard Tissue; Hokkaido University Graduate School of Dental Medicine; Sapporo Japan
3. Animal Resource Development Unit; RIKEN Center for Life Science Technologies; Kobe Japan
4. Genetic Engineering Team; RIKEN Center for Life Science Technologies; Kobe Japan
5. Fujii Memorial Institute of Medical Sciences; Tokushima University; Tokushima Japan