Fig. 4.
3D-printed scaffold with distinctive region microstructure and providing delivery system for protein releasing. Adopted from reference 86 with permission.
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.