Six year prospective multicentre randomized comparison of autologous saphenous vein and expanded polytetrafluoroethylene grafts in infrainguinal arterial reconstructions - Veith, F J; Gupta, S K; Ascer, E; White-Flores, S; Samson, R H; Scher, L A; Towne, J B; Bernhard, V M; Bonier, P; Flinn, W R; Astelford, P; Yao, J S T; Bergan, J J (J Vase Surg, 1986)