1. Department of Pathology, Faculty of Medicine Yamagata University Yamagata Japan
2. Department of Orthopedic Surgery, Faculty of Medicine Yamagata University Yamagata Japan
3. Department of Pathology Kobe City Medical Center General Hospital Kobe Japan
4. Department of Diagnostic Pathology Osaka Women's and Children's Hospital Osaka Japan
5. Department of Diagnostic Pathology National Hospital Organization Kure Medical Center/Chugoku Cancer Center Hiroshima Japan