| Date | Event | Description |
|---|---|---|
| 1 October 2009 | Amended | Search updated. One report added to Studies awaiting classification (Kigozi 2003). |
| 24 July 2009 | Amended | Contact details updated. |
| 11 September 2008 | Amended | Converted to new review format. |
| 15 January 2004 | New search has been performed | Search rerun but no new trials identified. |
| 24 May 2002 | New citation required and conclusions have changed | Substantive amendment |
| 13 March 2002 | New search has been performed | Review updated with one new trial. |
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