Fig. 1.
Flowchart illustrating selection of study participants
ACEI, angiotensin-converting enzyme inhibitors; ARB, angiotensin II receptor blockers; CRCBaSe, Colorectal Cancer Data Base.
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.