| Date | Event | Description |
|---|---|---|
| 6 June 2012 | New search has been performed | Three new trials identified. One included for this update (Arapoglou 2011) and two added as awaiting assessment (Claeys 2011; Mosti 2010). |
| 6 June 2012 | New citation required but conclusions have not changed | Third update, new search, no change to conclusions. |
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