a decreasing trendp =0.01
MM patients showed positive linear correlation coefficients for CD38/138+ EVs/mL and CD138EV-MFI and involved sFLCkappa (r=0.74, p =0.02 and r=0.64, p =0.05 respectively; Figure 8A and C ), while the value of CD138+EVs/mL of serum showed a decreasing trend when compared to FLCs (r=−0.8, p =0.01; Figure 8B ).