| Date | Event | Description |
|---|---|---|
| 15 January 2012 | New citation required but conclusions have not changed | This review has been updated. The addition of one more included study has not changed the results and conclusions. |
| 15 January 2012 | New search has been performed | Search updated. No new studies identified. One study (Wallon 2006), previously classified as pending has been included. This review now contains two included studies (involving a total of 5455 women). The methods have been updated. |
| 16 January 2008 | Amended | Converted to new review format. |
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.