1. Department of Chemistry; Shiga University of Medical Science, Seta; Otsu 520-2192 Japan
2. Institute of Ophthalmological Research; Department of Ophthalmology; Renmin Hospital of Wuhan University; Wuhan 430060 China
3. Department of Biomedical; Dental Materials and Engineering; Graduate School of Dental Medicine; Hokkaido University; Sapporo 060-8586 Japan
4. Department of Clinical Laboratory Medicine; Shiga University of Medical Science, Seta; Otsu 520-2192 Japan