Interferon/poly (lactic-co-glycolic acid) and chitosan/poly (lactic-co-glycolic acid) composite membranes for prevention of epidural scar adhesion following laminectomy Chinese Journal of Tissue Engineering Research . 2010, (47): 8916 -8920 .  DOI: 10.3969/j.issn.1673-8225.2010.47.043