Figure 1.
Flow diagram of case identification pathway. Vertical arrows indicate the flow of patients included in the data analysis; horizontal arrows indicate the patients who were excluded.
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.