<qa>  How much bone marrow is harvested from the subject intraoperatively during the Index Procedure?- Autologous bone marrow is harvested from the subject intraoperatively during the Index Procedure. Approximately 60 mL of bone marrow will be aspirated from the subjects iliac crest using the SmartPrep 2 Bone Marrow Processing Pack. The cellular rich portion will be concentrated via the SmartPrep BMAC 2 Centrifuge System at point-of-care to provide 7 mL of bone marrow aspirate concentrate BMAC. 1 - 2 mLs will be used for post-procedure testing of total nucleated cells, cell viability, and sterility. 