| Date | Event | Description |
|---|---|---|
| 31 August 2014 | New search has been performed | Search updated and five new studies were identified; two new studies have been included (Akhtar 2013; Hutton 2011) and three excluded (Dafallah 2004; El‐Muzaini 2008; Rust 2005). The review now includes five trials. The methods have been updated and now include the use of GRADE. |
| 31 August 2014 | New citation required but conclusions have not changed | This review has been updated to include a further two new studies. The results and conclusions have not changed. |
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