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.
Box-and-whisker plots showing retinopathy of prematurity (ROP) vascular severity score (VSS) score in Nepal and Mongolia by disease category. The ROP VSS score was associated with disease category (P < 0.001) in both countries and was higher in Mongolia compared with Nepal when associated with disease category (P < 0.001). TR = treatment-requiring.
