Date	Event	Description
1 November 2016	New search has been performed	In this update, published in 2016; the following changes were made: 1. The Background was updated, which included the addition of the new section on 'How the intervention might work'. 2. The search was updated to January 2016. 3. Two new studies were identified. Of these, one was included and one is an ongoing study. 4. Further modifications were made to 'Types of outcome measures'. 5. Summary of findings tables were generated.
1 November 2016	New citation required but conclusions have not changed	Changes were made to the authorship of the review.