Extended Data Table 1.
Key messages or recommendations relevant to data collection
Key messages or recommendations extracted from each source relating to data collection and how this may be a cause of bias.
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.