1. Department of Surgery, Minamisoma Municipal General Hospital, Fukushima 975-0033, Japan
2. Department of Health Informatics, School of Public Health, Kyoto University, Kyoto, 606-8501, Japan
3. Graduate School of Public Health, Teikyo University, Tokyo 173-8605, Japan
4. Global Public Health Unit, School of Social and Political Science, University of Edinburgh, Edinburgh, EH8 9LD, UK
5. Department of Radiation Protection, Minamisoma Municipal General Hospital, Fukushima 975-0033, Japan