History A list of downloadable documents created during development. Other information IP/1048 Occipital nerve stimulation for intractable chronic migraine: consultation comments table PDF 160 KB 23 April 2013 Equality impact assessment PDF 61 KB 24 April 2013 Additional information PDF 66 KB 16 November 2012 Systematic review PDF 2.2 MB 16 November 2012 Addendum to systematic review PDF 686 KB 22 November 2012 Consultation docuemnt information