A high volume of comments have been received in response to the appraisal consultation document (ACD). Given this and the importance of ensuring that NICE and the committee have adequate time to fully consider these comments, and where necessary engage with appropriate experts, we have taken the decision to reschedule the discussion of this appraisal. This topic will no longer be discussed at the meeting on Thursday 14 February 2019. This decision has not been taken lightly. It has been done to ensure that the committee can make the most informed and robust decision for this technology for patients with migraine. NICE will provide a further update on rescheduled timelines and a new committee date in due course.