1. Department of Nursing, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
2. Periodontology and Endodontology, Dental Clinic, Tokushima University Hospital, Tokushima, Japan
3. Department of Nursing, School of Health Sciences, Sapporo Medical University, Hokkaido, Japan
4. Diabetes Therapeutics and Research Center, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
5. Department of Hygiene and Oral Health Science, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
6. Department of Preventive Medicine, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan