| Date | Event | Description |
|---|---|---|
| 19 March 2015 | New citation required and conclusions have changed | Issue 4, 2015: Four new trials included in the update (Basak 2004; MUTT 2010; Parchand 2012; Sharma 2013) |
| 19 March 2015 | New search has been performed | Issue 4, 2015: Electronic searches were updated, plain language summary updated, Summary of findings table included |
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