| Date | Event | Description |
|---|---|---|
| 1 February 2018 | New citation required but conclusions have not changed | Updated search with 11 new studies. New author team. Conclusions similar to those of the previous review published in 2006. |
| 1 February 2018 | New search has been performed | Updated search – 11 new studies added. |
| 10 November 2008 | Amended | Converted to new review format. CMSG ID: C092‐R |
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