Ø Type and amount of chemotherapy received by patient prior to mobilization Ø Old age (>60 years) Ø History of Radiation therapy Ø Short interval period between chemotherapy and mobilization Ø Extensive disease Ø Bone marrow involvement Ø Use of immunomodulator like Lenalidomide Ø Poor marrow function (e.g., low platelet and CD34+ cell blood count) at time of mobilization |