3.1
NICE did a rapid review of the published literature on the efficacy and safety of this procedure. This comprised a comprehensive literature search and detailed review of the evidence from 7 sources, which was discussed by the committee. The evidence included 1 systematic review, 5 randomised controlled trials (3 of which are also included in the systematic review) and 1 review of safety events (including some of the same studies that are included in the systematic review). It is presented in the summary of key evidence section in the overview. Other relevant literature is in the appendix of the overview.