1. Department of Psychiatric Nursing, Graduate School of Medicine, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
2. Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
3. Cancer Control Center, Osaka International Cancer Institute, Osaka, Japan
4. Department of Public Mental Health Research, National Institute of Mental Health, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan