Date	Event	Description
15 February 2021	Amended	To clarify the status of this review, the following text has been added as an editorial note: "This 2008 review predates the mandatory use of GRADE methodology to assess the strength of evidence, and the review is no longer current. The author team is no longer available to maintain the review."
6 July 2020	Amended	To clarify the status of this review on cognitive behaviour therapy, the following text has been added to the Abstract: “This review was last updated in 2008 and is no longer current. The author team is no longer available to maintain the review.”
13 February 2009	Amended	Data on Employment status (Improvement over 12 months) added for Sharpe 1993 (see Graph 1.18), following confirmation of the correct time point by the trialists
1 November 2008	Amended	Authors updated
6 May 2008	Amended	Converted to new review format.
2 April 2008	New citation required and conclusions have changed	Updated through Department of Health Incentive Scheme