NICE did a rapid review of the published literature on the efficacy and safety of this procedure. This comprised a comprehensive literature search incorporating literature published since the last interventional procedures guidance on this procedure and a detailed review of the evidence from 9 sources. This was then discussed by the committee. The evidence included 2 systematic reviews and meta‑analyses, 3 randomised controlled trials (RCTs), a long‑term follow‑up analysis of 1 of the RCTs, 2 case series, and a secondary analysis of 1 of the case series. It is presented in the summary of key evidence section in the interventional procedures overview. Other relevant literature is in the appendix of the overview.