High levels of urokinase-type plasminogen activator (uPA) and its inhibitor PAI-1 in cytosolic extracts of breast carcinomas are associated with poor prognosis - Grondahl-Hansen, J; Christensen, I J; Rosenquist, C; Brünner, N; Mouridsen, H T; Dano, K; Blichert-Toft, M (Cancer Research, 1993)