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.
(a) Median global score, (b) time, (c) bone volume removed, and (d) the ratio of bone volume removed per second for the novice group (white bar) and expert group (grey bar). ∗Significant difference between the two groups (∗p < .05, ∗∗p < .01, and ∗∗∗p < .001).
