Combination of rat tail collagen and platelet-derived growth factor-BB for culture of human umbilical vein endothelial cells   
Cao Wen, Zhao Ai-chao, Chen Bang-dang, Liu Fen, Ma Yi-tong, Ma Xiang
Chinese Journal of Tissue Engineering Research . 2015, (8): 1177 -1183 .  DOI: 10.3969/j.issn.2095-4344.2015.08.006