The role of soluble and cell-surface expressed 4-1BB ligand in patients with malignant hemopoietic disorders. - Scholl, Nina; Loibl, Julia; Kremser, Andreas; Liepert, Anja; Grabrucker, Christine; Salih, Helmut Rainer; Kolb, Hans-Jochem; Schmetzer, Helga Maria (Leukemia & Lymphoma, 2009)