1. Department of Radiation Health Management, Fukushima Medical University School of Medicine, Fukushima City, Fukushima, Japan
2. Faculty of Medicine, Teikyo University School of Medicine, Itabashi, Tokyo, Japan
3. Yakushima Onoaida Clinic, Yakushima Town, Kagoshima, Japan
4. Department of Public Health, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan