CD44 and plasma cell myeloma: In these rare cases involving distinct populations, neither the MFI values of the subpopulations nor their relative ratios changed significantly (see Figure 3), except in the case of CD44 (mean ratio of subpopulations relative to all myeloma cells before vs. after separation, dimmer: 31.2% ± 20.5% vs. 35.6% ± 21.5, p = 0.005, brighter: 68.8% ± 20.5% vs. 64.4% ± 21.5, p = 0.0049).