1. Department of Pathology; Kanagawa Cancer Center; 2-3-2 Nakao, Asahi-ku Yokohama-shi Kanagawa, 241-0815 Japan
2. Department of Pathology; St. Marianna University School of Medicine; Kawasaki Japan
3. Department of Pathology and Oncology; School of Medicine; University of Occupational and Environmental Health Kitakyusyu; Japan
4. Department of Musculoskeletal Tumor Surgery; Kanagawa Cancer Center; Kanagawa Japan
5. Cancer Prevention and Control Division; Kanagawa Cancer Center Research Institute; Kanagawa Japan