Date	Event	Description
1 November 2016	New search has been performed	A search of the Cochrane Cystic Fibrosis and Genetic Disorders Group's Cystic Fibrosis Trials Register identified nine references to seven studies potentially eligible for inclusion in this review. These were assessed by the authors and unfortunately none were eligible for inclusion. Two studies previously listed as awaiting classification have now been excluded (NCT00298922; Uluer 2013).
1 November 2016	New citation required but conclusions have not changed	No new data have been included in this updated review, hence there are no changes to the conclusions.