[1] Sumitomo Hosp, Dept Ophthalmol, Osaka 5300005, Japan
[2] Osaka Univ, Dept Ophthalmol, Grad Sch Med, Osaka, Japan
[3] Kyushu Univ, Dept Ophthalmol, Grad Sch Med Sci, Fukuoka 812, Japan
[4] Surugadai Nihon Univ Hosp, Dept Ophthalmol, Fukuoka, Japan
[5] Fukushima Med Univ, Dept Ophthalmol, Fukuoka, Japan
[6] Kagawa Univ, Dept Ophthalmol, Fac Med, Takamatsu, Kagawa 760, Japan
[7] Nagoya Univ, Dept Ophthalmol, Grad Sch Med, Nagoya, Aichi 4648601, Japan