Foye, Patrick M Ganglion impar pulsed radiofrequency for coccyx pain. [electronic resource] - Journal of pain and symptom management Apr 2011 - e11-2; author reply e12 p. digital Publication Type: Comment; Letter ISSN: 1873-6513 Standard No.: 10.1016/j.jpainsymman.2010.12.003 doi Subjects--Topical Terms: Ablation TechniquesArthralgia--radiotherapyCoccyx--anatomy & histologyGanglia, Spinal--anatomy & histologyGanglia, SympatheticHumansMaleMiddle AgedRadio WavesSacrococcygeal Region--anatomy & histology