1. Department of Diagnostic Pathology Juntendo University Nerima Hospital Tokyo Japan
2. Department of Human Pathology Juntendo University School of Medicine Tokyo Japan
3. Department of Neurosurgery Juntendo University Nerima Hospital Tokyo Japan
4. Department of Pathology Shin‐Yurigaoka General Hospital Kanagawa Japan
5. Department of Diagnostic Pathology Hyogo Cancer Center Hyogo Japan
6. Division of Pathology for Regional Communication Kobe University School of Medicine Hyogo Japan