Long-term in vivo alterations of polyester vascular grafts in humans - Riepe,G.; Loos,J.; Imig,H.; Schroder,A.; Schneider,E.; Petermann,E.; Rogge,A.; Ludwig,M.; Schenke,A.; Nassutt,R.; Chakfe,N.; Morlock,M. (Eur J Vasc Endovasc Surg, 1997)