1. Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
2. Research Center for Inflammation and Regenerative Medicine, Doshisha University, Kyoto, Japan
3. Department of Biomedical Engineering, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan
4. Laboratory of Stem Cell Dynamics, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland