TNFRSF17 and Miyoshi myopathy: Up to now, we have detected the expression level of BCMA in peripheral blood of 97 MM patients by using the human BCMA/TNFRSF17 DuoSet ELISA kit (R&D) and made statistical analysis on 38 of them, which have detected the expression level of BCMA in their bone marrow at the same time.