| Date | Event | Description |
|---|---|---|
| 10 November 2009 | Amended | Contact details updated. |
| 11 August 2009 | Feedback has been incorporated | Comment on LONFLIT Studies |
| 4 June 2008 | Amended | Converted to new review format. |
| 4 April 2007 | Amended | One new included trial; added as a secondary reference to Scurr 2001. Updated dates of search in text. |
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