Date	Event	Description
30 August 2018	New citation required but conclusions have not changed	No new data have been added to the review so our conclusions remain the same.
30 August 2018	New search has been performed	A search of the Cochrane Cystic Fibrosis and Genetic Disorders Reveiw Group's Cystic Fibrosis Trials Register identified three references potentially eligible for inclusion in this review. Two references were additional references to the included study (Wainwright 2011) and one reference was an additional reference to an already excluded study (Chmiel 2015). The search of three registries of ongoing studies identified two references potentially eligible for inclusion in this review. Both the references were excluded from the analysis after screening (ISRCTN 12473810; NCT02363764).