Figure 2.
Awareness of participants if ultrasound and MRI involve ionizing radiation (χ2 = 7.54 with P > 0.274).
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.