| Date | Event | Description |
|---|---|---|
| 5 August 2015 | New citation required but conclusions have not changed | Our conclusions remain unchanged. |
| 5 August 2015 | New search has been performed | This review was updated in August 2015. We retrieved 616 new studies but none met our selection criteria. We excluded three new trials (Gjelstad 2013; Higashi 2014; Ratjen 2013). |
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