Which Glycosaminoglycans Are Suitable for Antithrombogenic or Athrombogenic Coatings of Biomaterials? Part II: Covalently Immobilized Endothelial Cell Surface Heparan Sulfate (ESHS) and Heparin (HE) on Synthetic Polymers and Results of Animal Experiments - Baumann, Hanno; Keller, Ruprecht (Seminars in Thrombosis and Hemostasis, 1997)