The correlation between the dosage of G-CSF and the number of CD34+ cells collected has been demonstrated in both healthy donors and cancer patients.14, 15, 16, 17 The European Blood and Bone Marrow Transplantation Group (EBMT) recommends administering 10 mg/kg/day G-CSF for PB-HSC mobilization in healthy donors.18 Here, CD34 is linked to cancer.