| Date | Event | Description |
|---|---|---|
| 31 March 2016 | New search has been performed | A search of the Cochrane Cystic Fibrosis and Genetic Disorders Group's Haemoglobinopathies Trials Register did not identify any potentially eligible trials. |
| 31 March 2016 | New citation required but conclusions have not changed | Minor changes have been made throughout the review. |
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