1. Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta; Department of Pathology, Dokkyo University Schoolof Medicine, Mibu; Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital,617-1, Takabayashinishi-cho Ohta, 373-8550, Japan
2. Department of Pathology and Genetics, Aichi Cancer Center Hospital, Nagoya;
3. Departmentof Pathology, Kitasato Medical Center Hospital, Kitamoto
4. Department ofPathology and Clinical Laboratories, Maebashi Red Cross Hospital, Maebashi
5. Department ofPathology and Clinical Laboratories, Ashikaga Red Cross Hospital, Ashikaga
6. Department of Pathology, Tone Central Hospital, Numata
7. Department of Pathology and Clinical Laboratories Kiryu Welfare General Hospital, Kiryu
8. Department of Pathology and Clinical Laboratories, National Tochigi Hospital, Utsunomiya
9. Second Department of Pathology, Gunma University School of Medicine, Maebashi
10. Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta
11. Department of Pathology, Fukuoka University School of Medicine, Fukuoka, Japan
12. Department of Pathology, Dokkyo University Schoolof Medicine, Mibu