Figure 2.
Author order for principal investigators from the grant-to-article matches by publication year. F, first author; L, last author; M, middle author.
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.