1. Department of Gerontological Nursing School of Nursing Tokyo Women's Medical University 8‐1 Kawada‐cho Shinjyuku‐ward Tokyo 162‐8666 Japan
2. Department of Adult Nursing/Palliative Care Nursing Division of Health Sciences and Nursing Graduate School of Medicine the University of Tokyo 7‐3‐1 Hongo Bunkyo‐Ku Tokyo 113‐0033 Japan
3. Department of Nursing Care Management Graduate School of Health Care Sciences Tokyo Medical and Dental University 1‐5‐45, Yushima Bunkyo‐Ku Tokyo 113‐8591 Japan
4. Department of Gerontological Nursing and Care System Development Graduate School of Health Care Sciences Tokyo Medical and Dental University 1‐5‐45, Yushima Bunkyo‐Ku Tokyo 113‐8591 Japan