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.
Egger's publication bias plot for the analysis of serum sPD‐L1 in OS in patients with ESCC: Egger's test for OS, Pr > |z| = 0.086 (continuity corrected). ESCC, esophageal squamous cell carcinoma; OS, overall survival; sPD‐L1, soluble programmed cell death ligand 1.
