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–i Quantitative polymerase chain reaction analysis for the validation of selected gene expression between hFF-1 (n=10) and WI-38 (n=6). j Relative mRNA levels of transforming growth factor alpha (Tgfa) in mouse feeder cells, namely STO and NIH/3T3 (n=5). *P<0.05
