RT Journal Article SR Electronic T1 Novel approach to pericapsular radiofrequency ablation of sacrococcygeal junction for patients with coccydynia JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 385 OP 385 DO 10.1136/rapm-2022-103488 VO 47 IS 6 A1 Liu, Christopher Weiyang A1 Zhang, Qianpian YR 2022 UL http://rapm.bmj.com/content/47/6/385.1.abstract AB