1. Department of Internal Medicine, Hirata Central Hospital, Fukushima, Japan
2. Department of Health Informatics, Kyoto University School of Public Health, Kyoto, Japan
3. Department of Thyroid Surgery, Hirata Central Hospital, Fukushima, Japan
4. Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
5. The Institute for Humanistic Studies, Kamakura Women’s University, Kanagawa, Japan
6. Department of Public Health, Fukushima Medical University School of Medicine, Fukushima, Japan