| Date | Event | Description |
|---|---|---|
| 16 November 2017 | New search has been performed | Searches performed until May 2017. One new trial added, but data could only be incorporated into qualitative analysis. |
| 8 November 2017 | New citation required but conclusions have not changed | Background updated. New references added. Searches re‐executed. Long‐term follow‐up of one previously included trial now incorporated to meta‐analysis. Three further meta‐analyses addressing same or similar review question identified and incorporated to review discussion. |
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