1. Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
2. Laboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.
3. Department of Regenerative Medicine, Fujita Health University School of Medicine, Aichi, Japan.
4. Department of Physiology, Keio University School of Medicine, Tokyo, Japan.
5. Japan Society for the Promotion of Science, Tokyo, Japan.