| Date | Event | Description |
|---|---|---|
| 16 December 2016 | New citation required but conclusions have not changed | Minor changes have been made throughout this update. |
| 16 December 2016 | New search has been performed | A new search of the Cochrane Cystic Fibrosis and Genetic Disorders Group's Haemoglobinopathies Trials Register did not identify any potentially relevant trials for inclusion in this update. |
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