| Date | Event | Description |
|---|---|---|
| 7 December 2016 | New citation required but conclusions have not changed | We have added 7 new trials (3451 participants) to the review. The review now
includes 29 trials. This review now includes a fixed‐effect logistic regression meta‐analysis of individual participant data from 5 trials, a cost‐effectiveness analysis, and a survey of trialists. We have detailed changes in authorship and methods used in 'Differences between protocol and review'. |
| 7 December 2016 | New search has been performed | We conducted a new search in October 2016. We identified 7 new studies and included them in this review. |
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.