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.
Seeded on day 0 as a single cell smNPC suspension, cells aggregate to a spherical shape within one day. Over time, they maintain their homogeneous round shape and grow in size.
