Primary human dermal fibroblasts isolated from neonatal foreskin, cryopreserved at the end of the primary culture. • Viability at least 70% • ≥500,000 viable cells⁄vial • Capable of at least 16 population doublings • Mycoplasma: Not Detected • Hepatitis B: Not Detected • Hepatitis C: Not Detected • HIV-1: Not Detected • Bacteria, yeast, and other fungi: Not Detected