Fig. 3. Methodological steps.
Flow chart depicting the major steps in the procedures used in the study. For details, see Materials and Methods.
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.