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.
Flow of trial reports identified and screened in this analysis is shown. The search recovered 3668 reports; 1873 reports were screened after removing duplicates; 117 reports were included after screening, and reasons for exclusion are stated in text. FLUKE indicates Follow Up Loss Effect Upon Skewing Evidence.
