OUTLINE: Patients receive interleukin-11 (IL-11) subcutaneously (SQ) on days 1-10 and filgrastim (G-CSF) SQ on days 4-10. Patients undergo peripheral blood stem cell (PBSC) collection on days 7-10 until the target number of cells is achieved or for a maximum of 4 collections. Patients are followed until transplantation.