What explains the varying efficiencies in TNC and CD34 recoveries during the separation of donated bone marrow into white cells by centrifuge, not through aspiration?

No direct evidence explains efficiency variations in TNC and CD34 recoveries during bone marrow separation by centrifuge, but factors like initial harvest quality, aspirate volume, and centrifugation protocol contribute. Observational studies indicate optimization potential in harvesting methods and initial aspirate quality management.