| Date | Event | Description |
|---|---|---|
| 17 August 2015 | New search has been performed | Five new trials were added in this update (Sørensen 2010#; Tjandra 2008;Dinning 2015#; Kahlke 2015#; Thin 2015). Risk of bias assessment was redone of all included trials. |
| 17 August 2015 | New citation required but conclusions have not changed | Five new trials were added in this update (Sørensen 2010#; Tjandra 2008;Dinning 2015#; Kahlke 2015#; Thin 2015). Risk of bias assessment was redone of all included trials. |
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