Optimism/Depression and immune function

Beauregard, M., Lévesque, J., & Bourgouin, P. (2001). Neural correlates of conscious self-regulation of emotion. J Neurosci, 21(18), RC165. 

Evans, D. L., Leserman, J., Pedersen, C. A., Golden, R. N., Lewis, M. H., Folds, J. A., & Ozer, H. (1989). Immune correlates of stress and depression. Psychopharmacol Bull, 25(3), 319-324.

Goleman, D. (1989). Psychology; Researchers find that optimism helps the body's defense system, The New York Times, pp. B14-B15. 

Levy, S. M. (1982). Biobehavioral interventions in behavioral medicine. An overview. Cancer, 50(9 Suppl), 1928-1935. 

McClelland, D. C., Floor, E., Davidson, R. J., & Saron, C. (1980). Stressed power motivation, sympathetic activation, immune function, and illness. J Human Stress, 6(2), 11-19. doi: 10.1080/0097840X.1980.9934531