| Date | Event | Description |
|---|---|---|
| 10 February 2012 | New citation required but conclusions have not changed | The searches were updated. No new trials were identified. However, all relevant to the review additional information found in recent publications was added. |
| 6 February 2012 | New search has been performed | The review was thoroughly updated following the Guidelines in the Cochrane Handbook for Systematic Reviews of Interventions (Higgins 2011). Trial sequential analysis (TSA program 2011) as well as Summary of Findings tables were performed. A detailed list of what is new is under "Differences between previous published version of the review and this review". |
| 3 January 2012 | New search has been performed | The authors' team is renewed; all but one are new authors. |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.