1. Division of Psycho-Oncology, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan
2. Department of Pulmonary Medicine, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan
3. Department of Neuropsychiatry, Keio University School of Medicine, Shinjuku-ku, Japan
4. Thoracic Oncology Division, National Cancer Center Hospital, Chuo-ku, Japan
5. Department of Psychiatry and Cognitive-Behavioral Medicine, Nagoya City Graduate School of Medical Science, Nagoya, Aichi, Japan