1. Immunologic response to collagen-impregnated vascular grafts: A randomized prospective study 
Journal of Vascular Surgery 
Volume 12, Issue 6, Pages (December 1990)
DOI: /mva
Copyright © 1990 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

2. Fig. 1
Time course of antibody development for patients with a positive humoral immune response to type I bovine native collagen (solid line, Microvel; broken line, Hemashield).
Journal of Vascular Surgery  , DOI: ( /mva )
Copyright © 1990 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

3. Fig. 2
Cell-mediated immune response to type I bovine native collagen (circle, Microvel; box, Hemashield). A stimulation index greater than 2 is considered positive.
Journal of Vascular Surgery  , DOI: ( /mva )
Copyright © 1990 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions