| Date | Event | Description |
|---|---|---|
| 7 July 2020 | New citation required and conclusions have changed | The addition of 27 studies has led to slight changes in our conclusions. |
| 8 July 2019 | New search has been performed | Search updated. This review is an update of the first review, which was published in July 2014. We have added two new authors: Wafa Kashbour (WK) and Neha Shah (NS). |
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