Date	Event	Description
12 May 2016	New search has been performed	No new trials identified
12 May 2016	New citation required but conclusions have not changed	No new trials identified. Summary of finding table added.
19 April 2012	New citation required but conclusions have not changed	No new trials were identified, but two additional studies were quoted in the background information.
13 April 2012	New search has been performed	This updates the review "Cromolyn sodium for the prevention of chronic lung disease in preterm infants|" (Ng 2001).
4 August 2009	New search has been performed	This review updates the existing review "Cromolyn sodium for the prevention of chronic lung disease in preterm infants" published in the Cochrane Database of Systematic Reviews (Ng 2001). Updated search found no new trials. No changes to conclusions.
16 September 2008	Amended	Converted to new review format.
30 June 2006	New search has been performed	This review updates the existing review "Cromolyn sodium for the prevention of chronic lung disease in preterm infants)" initially published in The Cochrane Library, Issue 2, 2001. In an updated search to April 2006 no new eligible studies were identified. The conclusion remains unchanged: there is no evidence from randomised trials that cromolyn sodium is effective in preventing chronic lung disease in preterm infants.
7 November 2000	New citation required and conclusions have changed	Substantive amendment