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.
The left part corresponds to the case group and the right part the control group. The inner circle represents the ICD chapters and the outer circle the ICD sections included in the chapter; the labels show the sections with the most frequent codes.
