<qa>  What is the name of the PBSC?- Patient is not able to collect autologous PBSC due to poor marrow reserve insufficient HSC-mobilization: 2.5 x 106 cluster of differentiation CD34 cellskg; or contraindications to undergoing HSC-mobilization; patient now has PD and has received at least 4 cycles of standard chemotherapy e.g. vincristine sulfate, doxorubicin hydrochloride, and dexamethasone VAD in the past 