1. Department of Pathology University of Tsukuba Hospital Ibaraki Japan
2. Department of Pathology, National Hospital Organization Ibaraki Higashi National Hospital Ibaraki Japan
3. Department of Pathology, Faculty of Medicine University of Tsukuba Ibaraki Japan
4. Department of Medicine, University of California San Francisco San Francisco California USA
5. Naritatomisato Tokushukai Hospital Chiba Japan
6. Shonan Research Institute of Innovative Medicine Kanagawa Japan