Figure 1.
Study flow chart and main results. COVID-19: coronavirus disease 2019; SARS-CoV-2: severe acute respiratory syndrome virus 2; CT: chest computed tomography.
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.