Date	Event	Description
6 August 2016	New search has been performed	New search. No new trials found.
6 August 2016	New citation required but conclusions have not changed	Background and Discussion updated. Conclusions unchanged. Two additional authors joined the review team.
14 June 2013	Amended	Correction to author affiliation, acknowledgements and sources of support
6 February 2013	New citation required but conclusions have not changed	Results of new searches fully incorporated
9 July 2012	New search has been performed	New search to 9 July 2012. No new completed trials. Three ongoing trials added. Text updated. Search strategies updated with intervention terms.
30 July 2008	New citation required and conclusions have changed	Change of first author Two new trials added Change of title. This Cochrane review was previously published as Cytotoxic drugs and interferons for chronic inflammatory demyelinating polyradiculoneuropathy.
27 April 2008	Amended	Converted to new review format.
21 March 2007	New search has been performed	The searches were updated in March 2007. No new trials were identified.
1 January 2006	New search has been performed	We updated the searches of the NMD Group Trials Register, MEDLINE and EMBASE (to September 2005). No new randomised trials were found. We included additional non‐randomised studies in the Discussion section of the review.
1 July 2004	New citation required and conclusions have changed	Substantive amendment