1. Department of Surgery and Oncology; Graduate School of Medical Sciences; Kyushu University; 3-1-1 Maidashi, Higashi-ku Fukuoka 812-8582 Japan
2. Department of Medicine and Bioregulatory Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
3. Department of Anatomic Pathology; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan