Figure 1.
CONSORT (Consolidated Standards of Reporting Trials) flow diagram. DR, double-row; SR, single-row.
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.