Date	Event	Description
22 September 2015	Amended	An error has been corrected: an incorrect statement that small trials in children had shown more benefit from high than low dose IVIg has been deleted
18 June 2014	New citation required but conclusions have not changed	No change to conclusions. New search with no new trials
2 December 2013	New search has been performed	Updated, and correction of minor discrepancies in figures within text.
24 January 2012	New citation required but conclusions have not changed	Updated
15 August 2011	New search has been performed	Search updated. One new trial included
6 April 2010	New citation required and conclusions have changed	Weight of evidence added to conclusions from 'Summary of findings' table. Jean‐Claude Raphael retired from authorship.
28 July 2009	New search has been performed	Searches repeated with new MEDLINE and EMBASE RCT filters. No new trials. 'Risk of bias' and 'Summary of findings' tables added.
23 July 2008	Amended	Converted to new review format.
22 August 2007	New search has been performed	Searches were repeated in March 2007 and no new trials were identified. Searches will be run again in May 2008.
14 September 2005	New citation required and conclusions have changed	Four new trials were included.