Increased urokinase receptor levels in human gastrointestinal neoplasia and related liver metastases. - Sier,C.F.; Quax,P.H.; Vloedgraven,H.J.; Verheijen,J.H.; Griffioen,G.; Ganesh,S.; Lamers,C.B.; Verspaget,H.W. (Invasion Metastasis, 1993)