1. From the Laboratory of Retinal Cell Biology and the2Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan; the
2. Department of Ophthalmology and Visual Sciences, Hokkaido University Graduate School of Medicine, Sapporo, Japan; and the
3. Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan; the
4. From the Laboratory of Retinal Cell Biology and the5Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.