1. Department of Surgery, Jyoban Hospital of Tokiwa Foundation , Iwaki, Fukushima , Japan
2. Department of Radiation Health Management, Fukushima Medical University School of Medicine , Fukushima , Japan
3. Department of Medical Epigenomics Research, Fukushima Medical University School of Medicine , Fukushima , Japan
4. Department of Breast and Thyroid Surgery, Jyoban Hospital of Tokiwa Foundation , Iwaki, Fukushima , Japan
5. Department of Surgery, Itabashi Chuo Medical Center , Tokyo , Japan