Date	Event	Description
15 March 2012	New citation required but conclusions have not changed	A new author joined the review team.
13 March 2012	New search has been performed	Searches conducted.
22 February 2010	New search has been performed	Searches conducted. One new included trial (Esposito 2005) and six new excluded trials (Atkinson 2007; Bradley 2007; Esposito 2006; Fonseca‐Aten 2006; Lee 2008; Simon 2006) have been added to the update.
22 February 2010	New citation required and conclusions have changed	A new author joined the review team. The conclusion has changed to reflect the new included trial.
22 July 2008	Amended	Converted to new review format.
23 May 2005	Amended	Review first published Issue 3, 2005