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 number of the grant from the Ministry of Science, Republic of Serbia was incorrectly given. The Funding Statement should read: "This work is supported by the Ministry of Science, Republic of Serbia. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript."
Competing Interests: No competing interests declared.
