1. Department of Psychiatric Nursing, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai-shi, Miyagi 980-8575, Japan
2. Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, the Netherlands
3. Research Center for Social Science & Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
4. Department of Psychiatric Nursing, Tohoku University Graduate School of Medicine, Miyagi, Japan
5. Division of Psycho-Oncology, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Chiba, Japan