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.
Face divided in three main areas of nose, right and left cheek to quantify the vectors (a). Magnitude of the vectors representing changes in each area presented in histogram (b–d). X-axis represents the vectors’ magnitude and Y-axis represents the number of vectors of each variable magnitudes
