1. Department of Radiation Health Management, School of Medicine, Fukushima Medical University, 1 Hikariga-oka, Fukushima 960-1295, Japan
2. Department of Public Health, School of Medicine, Fukushima Medical University, 1 Hikariga-oka, Fukushima 960-1295, Japan
3. Health Promotion Center, Fukushima Medical University, 1 Hikariga-oka, Fukushima 960-1295, Japan
4. Department of Internal Medicine, Soma Central Hospital, Okinouchi, Soma, Fukushima 976-0016, Japan
5. Department of Surgery, Jyoban Hospital of Tokiwa Foundation, Fukushima 972-8322, Japan
6. Department of Health Nursing of International Radiation Exposure, School of Medicine, Fukushima Medical University, 1 Hikariga-oka, Fukushima 960-1295, Japan
7. Department of General Internal Medicine, Hirata Central Hospital, Hirata, Ishikawa District, Fukushima 963-8202, Japan