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.
There were errors in the placement of the figure legends. The legend published with Figure 3 should be with Figure 5. The legend published with Figure 4 should be with Figure 3. The legend published with Figure 5 should be with Figure 4.
Competing Interests: No competing interests declared.
View on publisher site
