Fig 4 Regression of erythroid stimulating agent on log risk ratio of red blood cell transfusion. Slope of regression line 0.32, 95% confidence interval 0.02 to 0.63; P=0.04)
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.