1. From the Department of Ophthalmology, Tokyo Dental College, Ichikawa, Japan;2Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan;
2. Maruishi Kasei Research, Tokyo, Japan;
3. From the Department of Ophthalmology, Tokyo Dental College, Ichikawa, Japan;
4. Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan;
5. Ryogoku Eye Clinic, Tokyo, Japan;
6. Eye Clinic, Nagoya Social Insurance Chukyo Hospital, Nagoya, Japan; and the
7. Statistics Group, Santen Pharmaceuticals, Osaka, Japan.