NFKB1 and Miyoshi myopathy: To gain further insight into the nature of the BMSC-secreted factor capable of inducing bortezomib-resistant NF-κB activity, CM was collected from 17 MM-BMSCs and 13 non-MM BMSCs and a cytokine array was used to simultaneously measure protein levels of 27 human cytokines in each sample (Additional File 4).