1. Department of Ophthalmology, Sapporo City General Hospital, Sapporo, Japan; and2Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan.
2. Department of Ophthalmology, Sapporo City General Hospital, Sapporo, Japan; and
3. Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan.