The effect of transdermal fentanyl treatment on serum cortisol concentrations in patients with non-cancer pain  Emine Ozyuvaci, MD, Nergis Yanmaz Alnigenis, MD, Aysel Altan, MD  Journal of Pain and Symptom Management  Volume 28, Issue 3, Pages 277-281 (September 2004) DOI: 10.1016/j.jpainsymman.2003.11.004

Figure 1 Basal cortisol concentrations (μg/dL) and the levels on Days 30, 60, and 90 of pain treatment. Journal of Pain and Symptom Management 2004 28, 277-281DOI: (10.1016/j.jpainsymman.2003.11.004)

Figure 2 Initial VAS scores of the patients and the scores on Days 30, 60 and 90 of pain treatment. Journal of Pain and Symptom Management 2004 28, 277-281DOI: (10.1016/j.jpainsymman.2003.11.004)