Date	Event	Description
31 March 2014	New search has been performed	Search updated to January 2014. Methodology of the review updated to incorporate 'Risk of bias' and 'Summary of findings´ tables.
8 February 2014	New citation required but conclusions have not changed	Title of the review was changed to reflect the population evaluated. New authors have taken over this review. The review was updated with nine additional excluded studies. No new studies were found for inclusion.
27 July 2010	Feedback has been incorporated	Feedback and author response added. Due to unforeseen circumstances, the feedback was not published when received in August 2008. The Cochrane Heart Group apologises for the delay
8 September 2008	Amended	Converted to new review format.
28 January 2008	New citation required and conclusions have changed	Substantive amendment