| Date | Event | Description |
|---|---|---|
| 19 September 2017 | New search has been performed | New search run. Three new studies included and 7 new studies excluded |
| 19 September 2017 | New citation required and conclusions have changed | New search run. Three new studies included and 7 new studies excluded. Text amended to reflect current Cochrane standards. 'Summary of findings' table added. Conclusions changed |
| 1 June 2015 | Amended | Error in plain language summary regarding speed of intervention amended |
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