| Date | Event | Description |
|---|---|---|
| 8 May 2017 | New citation required but conclusions have not changed | Review fully updated with new data from search update. New results did not alter the overall conclusions of the review. |
| 29 June 2016 | New search has been performed | Results of update search added to review, minor changes to discussion and conclusions. |
| 25 January 2016 | Amended | Search updated and 1344 references were sent to the review authors for screening. |
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