4Bucala R, Spiegel LA, Chesney J, et al. Circulating fibrocytes define a new leukocyte subpopulation that mediate tissue repair. Mol Med, 1994, 1:71-81.
5Muir IF, Padilla-Lamb A, Stewart JE, et al. Growth inhibition of cultured fibroblasts by extracts from human dermis. Br J Plast Surg, 1997, 50:186-193.