1. Cornea Center, Tokyo Dental College, Ichikawa, Chiba, Japan
2. Department of Ophthalmology, Keio University School of Medicine, Shinjuku‐ku, Tokyo, Japan
3. Department of Physiology, Keio University School of Medicine, Shinjuku‐ku, Tokyo, Japan
4. Department of Regenerative Medicine and Advanced Cardiac Therapeutics, Keio University School of Medicine, Shinjuku‐ku, Tokyo, Japan