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 9 sources, which was discussed by the committee. The evidence included 1 systematic review (of 1 randomised controlled trial and 5 retrospective studies), 1 randomised controlled trial, 2 prospective case series and 5 retrospective cohort studies. It is presented in the summary of key evidence section in the overview. Other relevant literature is in the appendix of the overview.