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.
Time based distribution of the 2,952 hints generated by the following MEDLINE/PubMed search string: (network[tiab] OR ((mixed[tiab] OR multiple[tiab] OR indirect[tiab]) AND (treatment*[tiab] OR comparison*[tiab])) AND meta-analysis[tiab]) NOT (animal[mh] NOT human[mh]).
