ocr: VECTOR MARKING To I Identify Origin of Relapse and for Purification of Diploid Stem Cells - - - - - - - - - - BM - - de 2 bo Purge - Harvest Marking Chemo Vector - BMT Marked Cells - 1) Follow until Relapse 2) Test for Marked Cells Conclusion: If Positive, Relapse arose from Purged Autologous Marrow