| Date | Event | Description |
|---|---|---|
| 9 November 2018 | Feedback has been incorporated | See Feedback 2. |
| 8 March 2018 | Amended | Affiliation updated. |
| 14 August 2017 | Feedback has been incorporated | See Feedback. |
| 12 April 2017 | New citation required but conclusions have not changed | We identified one new study with 185 participants (Hardy 2012). We assessed risk of bias and the quality of the evidence according to GRADE. |
| 12 April 2017 | New search has been performed | This review has been updated to include the results of a new search in December 2016/January 2017. |
| 13 May 2009 | Amended | Contact details updated. |
| 30 October 2008 | Amended | History, What's New and citation corrected |
| 4 August 2008 | Amended | Converted to new review format. |
| 19 June 2007 | New search has been performed | Review updated with revised search but no new trials were identified for this update. |
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