Table 1.
Examples from Code Book Developed to Identify Terms Related to the 3 Surgical Treatments of Migraine Headaches When Collecting Data from Facebook Posts
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.