1. Department of Pathology; Division of Pediatric Oncology; National Center for Child Health and Development; Tokyo
2. Department of Diagnostic Pathology; Faculty of Medicine; University of Tsukuba; Ibaraki
3. Department of Neuropathology; Institute for Medical Science of Aging, Aichi Medical University; Aichi
4. Department of Medical Subspecialties; Division of Pediatric Oncology; National Center for Child Health and Development; Tokyo
5. Department of Diagnostic Pathology; University of Tokyo Medical University Ibaraki Medical Center; Ibaraki Japan