Leukapheresis products in multiple myeloma: lower tumor load after mobilization with cyclophosphamide plus granulocyte colony-stimulating factor (G-CSF) compared with G-CSF alone - Cremer, Friedrich Walter; Kiel, Katja; Wallmeier, M.; Haas, Rainer; Goldschmidt, Hartmut; Moos, Marion (Experimental hematology, 1998)