Figure 6.
A block diagram showing the most frequently co-occurring symptoms for each size of symptom set. With the exception of set sizes 7, 11, and 14, the symptoms follow a strongly nested pattern.
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.