Baek IY, Park JY, Kim HJ, Yoon JU, Byoen GJ, Kim KH.  Spinal Cord Stimulation in the Treatment of Postherpetic Neuralgia in Patients with Chronic Kidney Disease: A Case Series and Review of the Literature.  Korean J Pain 2011;24:154-157.  https://doi.org/10.3344/kjp.2011.24.3.154