Urokinase-type plasminogen activator is effective in fibrin clearance in the absence of its receptor or tissue-type plasminogen activator - Bugge, TH; Flick, MJ; Danton, MJS; Daugherty, CC; Rømer, J; Danø, K; Carmeliet, P; Collen, D; Degen, JL (Proc Natl Acad Sci USA, 1996)