Date	Event	Description
10 June 2020	New citation required but conclusions have not changed	Two authors have joined the review team (SS and NJ) and SS has taken the lead on the review. Previous versions of this review were found to be noncompliant with the Cochrane conflict of interest policy, which includes the relevant parts of the Cochrane Commercial Sponsorship Policy, by the Cochrane Funding Arbiters. This updated version of the review is now compliant with the policy. No new data have been included in this version of the review, therefore our conclusions remain the same. Due to a lack of research in this area, the review will not be updated until the authors become aware of new research in the field.
10 June 2020	New search has been performed	A search of the Cystic Fibrosis and Genetic Disorders Review Group's Cystic Fibrosis Trials Register identified four references and online registry searches identified two references. One of the references from the Cochrane Register search was a duplicate of an additional reference to the included trial (Yau 2014); none of the remaining references evaluated antimicrobial testing to guide antibiotic therapy and therefore were not even listed as excluded in the current version of the review.
19 March 2020	Amended	Clarification statement added from Alan Smyth, Co‐ordinating Editor on 19 March 2020: This review was found by the Cochrane Funding Arbiters, post‐publication, to be noncompliant with the Cochrane conflict of interest policy, which includes the relevant parts of the Cochrane Commercial Sponsorship Policy. The review will be updated by August 2020; both authors of the future update will be free of conflicts.
26 September 2017	New citation required but conclusions have not changed	No new data have been added to this update so our conclusions remain the same.
26 September 2017	New search has been performed	A search of the Cystic Fibrosis and Genetic Disorders Review Group's Cystic Fibrosis Trials Register identified four new references to an already included study (Yau 2014). No new studies were identified in the searches of ongoing trials registries. A summary of findings table has been added to the review.
25 February 2015	New search has been performed	A search of the Cystic Fibrosis & Genetic Disorders Group's Cystic Fibrosis Trials Register identified three new references to a single trial which was included in the review (Yau 2014). In the original review, this trial had been identified and listed as ongoing.
25 February 2015	New citation required but conclusions have not changed	Despite the inclusion of a new trial, our conclusions remain the same.