The two arms were also well balanced with respect to age, sex, type of myeloma and initial levels of haemoglobin, leucocytes, neutrophils, platelets, albumin, GFR (patients not on dialysis only), beta 2 microglobulin, corrected calcium, sFLC, bone marrow plasma cells and International Staging System (Supplementary Material 2). Here, B2M is linked to plasma cell myeloma.