Date	Event	Description
28 April 2020	New citation required but conclusions have not changed	One author (Kiran K Thumburu) has stepped down from the review team and two new authors have joined the team (Anil Chauhan and Nikita Jaiswal). Since no new trials have been added to the review at this update our conclusions remain the same.
28 April 2020	New search has been performed	A search of the Cochrane Cystic Fibrosis and Genetic Disorders Cystic Fibrosis Trials Register did not identify any new references potentially eligible for this updated review. Searches of online trials registries yielded two ongoing studies that were not relevant to the review question.