Following the scoping exercise this topic was not referred to NICE for a Technology Appraisal. It was agreed the topic would be incorporated in clinical guideline update (NICE guideline 28). The block scoping report containing this topic is published here; https://www.nice.org.uk/about/what-we-do/our-programmes/nice-guidance/nice-technology-appraisal-guidance/block-scoping-reports (Batch 64)