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 disc space narrowing and osteophytosis score comparisons between women (dotted trend line) and female monkeys (solid trend line) above, and men (dotted trend line) and male monkeys (solid trend line) below. Monkey ages have been adjusted to represent their human equivalent based on 1:3.5yr human:monkey age ratio 14–16.
