| Date | Event | Description |
|---|---|---|
| 17 October 2011 | New search has been performed | New author added |
| 17 October 2011 | New citation required but conclusions have not changed | CAESAR and PIVOTAL results included in the analysis |
| 20 May 2008 | New search has been performed | ADAM trial results incorporated in analysis. CAESAR and PIVOTAL trials added to ongoing studies. |
| 8 April 2008 | Amended | Converted to new review format. |
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