1. From the Departments of Ophthalmology,2Medical Biochemistry, and3Physiology, Shiga University of Medical Science, Seta, Otsu, Japan; and
2. Medical Biochemistry, and
3. Physiology, Shiga University of Medical Science, Seta, Otsu, Japan; and
4. From the Departments of Ophthalmology,
5. Institute of Vision Research, Nagoya, Japan.