1. Department of Surgery; Hiroshima City Asa Citizens Hospital; Hiroshima Japan
2. Department of Pathology; Hiroshima City Asa Citizens Hospital; Hiroshima Japan
3. Department of Pathology; Hiroshima University Graduate School of Biomedical & Health Sciences; Hiroshima Japan
4. Department of Surgical Pathology; Hyogo Medical College of Medicine; Nishinomiya Japan