Zaniolo, Orietta, et al. “Cost-Effectiveness Evaluations of Spinal Neuromodulation With Ziconotide Continuous Infusion in Cancer Pain in a Real Clinical Practice”. Farmeconomia. Health Economics and Therapeutic Pathways, vol. 12, no. 2, June 2011, pp. 87-94, doi:10.7175/fe.v12i2.74.