In this pilot study of Marrow Cellution^TM, a novel bone marrow access and retrieval device, greater stem/progenitor cell concentrations were demonstrated compared to previously published works that used a combinations of a traditional needle with a centrifuge-based cellular processing system. A CFU-f test was conducted to determine the quality of the marrow aspirate because cells capable of forming a CFU-f are routinely found in marrow but rarely in peripheral blood. Consequently, CFU-f data collected in this study to historical CFU-f data from traditional needle plus centrifugation systems are found in this white paper.