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.
Rates of responses to the question “What is the contribution of the following factors to the higher rate of data sharing in DNA studies of ancient compared to extant humans?”. The absolute values are given in parentheses. See Materials and Methods for complete statements.
