| Date | Event | Description |
|---|---|---|
| 30 September 2014 | New citation required but conclusions have not changed | Review updated. |
| 30 September 2014 | New search has been performed | Search updated. Seven new reports were identified. All of them reported new information for two included studies (Lopes 2009; Zaman 2008). Data from the new reports were added. A 'Summary of findings' table has been incorporated. |
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