| Date | Event | Description |
|---|---|---|
| 27 February 2017 | New citation required but conclusions have not changed | Since no additional references could be added to this review, our conclusions remain the same. |
| 10 October 2016 | New search has been performed | A search of the Cystic Fibrosis and Genetic Disorders Group's Cystic Fibrosis Trials Register and searches of ongoing trials registries did not identify any new references potentially eligible for inclusion in this review. |
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