1. Department of Psycho‐oncology Saitama Medical University International Medical Center Hidaka City Japan
2. Department of General Medicine Ogano Central Hospital Chichibu‐gun Japan
3. Department of Nursing Saitama Medical University International Medical Center Hidaka City Japan
4. Department of Clinical Epidemiology Graduate School of Biomedical Sciences Nagasaki University Nagasaki City Japan
5. Department of Medical Oncology Mitsubishi Kyoto Hospital Kyoto City Japan