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.
Manual coding steps. This diagram documents the general flow of manual coding and includes some basic numbers to clarify how the project arrived at its final valid dataset. The question branches indicate what was recorded by the coding team for each trial.
