TNFRSF17 and B-cell chronic lymphocytic leukemia: In the study by Friedman et al.21, cell surface BCMA expression was evaluated in 9 NHL cell lines (myelogenous leukemia, n = 2; ALL, n = 2; MCL, n = 2; Burkitt’s lymphoma, n = 2; B-CLL, n = 1) using IHC.