1. Department of Internal Medicine, Soma Central Hospital, Fukushima, Japan;
2. Research Institute of Innovative Medicine (RIIM), Tokiwa Foundation, Fukushima, Japan;
3. Department of Public Health, University of Occupational and Environmental Health, Fukuoka, Japan;
4. Department of Internal Medicine, Metropolitan Bokutoh Hospital, Tokyo, Japan;
5. Katsushika Rehabilitation Hospital, Tokyo, Japan