Use of filgrastim for the mobilisation of PBPCs in normal donors prior to allogeneic PBPC transplantation In normal donors, a 1 MU/ kg/ day (10 μ g/ kg/ day) dose administered subcutaneously for 4 - 5 consecutive days allows a collection of ≥ 4 x 106 CD34+ cells/ kg recipient BW in the majority of the donors after two leukaphereses.