Additional file 1:
Download video file (11.1MB, wmv)
Ultrasonographic appearance of AMFB. Collection of short ultrasound clips showing the characteristics of AMFB. (WMV 11397 kb)
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.