1. Department of Ophthalmology; The University of Tokyo Hospital; Tokyo Japan
2. Department of Haematology and Oncology; The University of Tokyo Hospital; Tokyo Japan
3. Department of Pathology; The University of Tokyo Hospital; Tokyo Japan
4. Department of Pathology; Yokohama Municipal Citizen's Hospital; Yokohama Japan
5. Pathology Division; National Cancer Centre Hospital; Tokyo Japan
6. Department of Pathology; Saitama Cancer Centre; Saitama Japan
7. Department of Pathology; Organization of Occupational Health and Safety; Kanto Rosai Hospital; Kawasaki City Japan
8. Department of Diagnostic Pathology; Yokohama City University Medical Centre; Yokohama City Japan