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 10 sources, which was discussed by the committee. The evidence included 2 randomised controlled trials (both of which had longer follow up reported in separate papers), 2 systematic reviews and 4 case series (1 of which was also included in the systematic reviews). It is presented in table 2 of the overview. Other relevant literature is in the appendix of the overview.