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.
The knee is located at the 17th accepted article (time of discovery: 43 articles) which is represented by the dotted line. In total, 128 articles were screened (represented by the blue line) and 21 were accepted for data extraction.
