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.
Average percentage of lung involvement of the five lobes at different time stages in the ordinary group (A) and the severe/critical group (B). R1, right upper lobe; R2, right middle lobe; R3: right lower lobe; L1: left upper lobe; L2: left lower lobe.
