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.
Funnel plot analysis of (A). Begg correlation test (P = 1.000) and Egger test (P = .740). Funnel plot analysis of (B). Begg correlation test (P = .734) and Egger test (P = .406). Funnel plot analysis of (C). Begg correlation test (P = 1.000) and Egger test (P = .804).
