FIGURE 2.
Section of visual schedule. For the entire visual schedule, see Supplemental Digital Content 2, “Visual Schedule!,” available at http://links.lww.com/OPX/A190.
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.