1. Department of Diagnostic Pathology and Cytology, Kuma Hospital, Kobe 650-0011, Japan
2. Department of Surgery, Kuma Hospital, Kobe 650-0011, Japan
3. Department of Internal Medicine, Kuma Hospital, Kobe 650-0011, Japan
4. Department of Diagnostic Pathology, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
5. Department of Thyroid and Endocrinology, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
6. Department of Diagnostic Pathology, Faculty of Medicine, Oita University, Yufu 879-5593, Japan
7. Department of Pathology, University of Yamanashi, Yamanashi 409-3898, Japan
8. Department of Radiation Medical Sciences, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki 852-8523, Japan