Date	Event	Description
24 March 2014	Amended	Contact details updated.
15 March 2013	New citation required but conclusions have not changed	The review has been expanded to include adults as well as children. Minor changes to the text have been made throughout.
15 March 2013	New search has been performed	A search of the Cochrane Cystic Fibrosis and Genetic Disorders Group's Haemoglobinopathies Trials Register did not identify any potentially eligible trials for inclusion in the review.
6 October 2010	New search has been performed	A search of the Group's Haemoglobinopathies Trials Register did not identify any potentially relevant trials for inclusion in the review.
9 September 2009	New search has been performed	A search of the Group's Haemoglobinopathies Trials Register did not identify any references potentially eligible for inclusion in this review.
28 March 2008	Amended	Converted to new review format.