Date	Event	Description
2 June 2014	Amended	Minor copy edit made to search strategies and study name
16 May 2014	New search has been performed	Methods updated, new search performed, title changed to reflect current terminology and the new scope of the review
16 May 2014	New citation required and conclusions have changed	New studies and interventions included
30 September 2008	Amended	Converted to new review format.
25 May 2005	New citation required and conclusions have changed	Substantive amendment