| Date | Event | Description |
|---|---|---|
| 14 December 2015 | New citation required but conclusions have not changed | Methods changed to align with current guidance. Study selection criteria revised to include RCTs only. Search strategies updated to reflect new terminology employed. This review includes seven studies. |
| 11 December 2015 | New search has been performed | New searches performed to 4 September 2015. One new study identified. |
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