Following the release of the Final Appraisal Determination (FAD) in February 2018 and receipt of an appeal lodged by Eisai, NICE has realised that a procedural error has been made in the handling of the above technology appraisal. As a consequence, we will be retracting the Final Appraisal Determination (FAD) as issued on 8 February 2018, and instead we will be releasing an Appraisal Consultation Document (ACD) for consultation. The appraisal committee will consider the responses to the consultation at its meeting on Tuesday 15 May 2018.