1. Institute of Regenerative Medicine, Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang 212001, China
2. Department of Medicinal and Life Sciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda 278-8510, Japan
3. School of Medicine, Yokohama City University, Yokohama 234-0006, Japan
4. Center for Stem Cell Biology and Regenerative Medicine, Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan