Figure 1.
Flowchart of included patients. Only those patients who received ≥5 units of red blood cells within 12 h were included for analysis
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.