Giese-Davis J, Sephton SE, Abercrombie HC, Durán RE, Spiegel D. Repression and high anxiety are associated with aberrant diurnal cortisol rhythms in women with metastatic breast cancer. Health Psychol. 2004 Nov;23(6):645–50. doi: 10.1037/0278-6133.23.6.645. PMID: 15546233.