1. Department of Anatomic Pathology; Graduate School of Medical Sciences; Kyushu University; 3-1-1 Maidashi Higashi-ku Fukuoka 812-8582 Japan
2. Department of Orthopedic Surgery; Graduate School of Medical Sciences; Kyushu University; 3-1-1 Maidashi Higashi-ku Fukuoka 812-8582 Japan