1. Department of Physiology, Keio University School of Medicine, Tokyo, Japan
2. Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan
3. National Hospital Organization, Murayama Medical Center, Musashimurayama, Japan
4. Department of Molecular and Cellular Physiology, Graduate School of Medicine, University of the Ryukyus, Nishihara, Japan
5. Department of Cell Pharmacology, Graduate School of Medicine, Nagoya University, Nagoya, Japan
6. Department of Research Superstar Program Stem Cell Unit, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan