Date	Event	Description
30 November 2016	New citation required but conclusions have not changed	One new trial added and the conclusions remain unchanged.
30 November 2016	New search has been performed	Search updated, seven trial reports identified. One new trial added for this update from ongoing studies (Dalfrà 2009). The review now includes 10 trials. 'Risk of bias' assessments for blinding have been updated to include assessments of both performance and detection bias. 'Summary of findings' tables have been incorporated.