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 6 sources, which was discussed by the committee. The evidence included 1 prospective observational study, 3 retrospective cohort studies, 2 retrospective chart reviews that did subgroup analyses of 1 of the retrospective cohort studies, and 1 follow-up analysis of the people included in the prospective observational study. It is presented in the summary of key evidence section in the overview. Other relevant literature is in table 5 of the overview.