HS from Creative Bioarray Research Laboratories are isolated from human synovium. HS are cryopreserved at passage one cultures and delivered frozen. Each vial contains >5 x 10^5 cells in 1 ml volume. HS are characterized by their fibroblast-like morphology, growth pattern and immunocytochemistry of CD 90 and fibronectin. HS are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi. HS are guaranteed for 15 population doublings at the conditions provided by Creative Bioarray.