| Date | Event | Description |
|---|---|---|
| 10 September 2005 | New search has been performed | This Cochrane review, first published in 2003, was updated in September 2005. There were no further studies identified in the search. There were no comments lodged on The Cochrane Library Feedback website as at 31 October 2005. |
| 10 September 2005 | Amended | Minor changes were made to the content of the review to amend some minor typographical and grammatical errors. |
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