Date	Event	Description
21 August 2014	Amended	All declaration of interest statements from the authors are now included in the review.
31 July 2014	New search has been performed	The search for studies has been updated to 23 September 2013. One ongoing study was identified (NCT01231139), and its results will be included into the review by the end of 2015.
31 July 2014	New citation required but conclusions have not changed	The authors of the review have changed.
5 September 2007	New citation required and major changes	Protocol first published.