Purification of an active plasminogen activator inhibitor immunologically related to the endothelial type plasminogen activator inhibitor from the conditioned media of a human melanoma cell line [published erratum appears in J Biol Chem 1988 Jan 25;263(3):1593] - Wagner, OF; Vetterlein, M; Binder, BR (J Biol Chem, 1986)