It is administrated in a sequential infusion followed by iodine131 (131I) tositumomab (i.e., the antibody linked to I131 by a covalent reaction) which emits both beta and gamma radiation [149-150]. It is indicated for the treatment of patients with CD20 antigen-expressed refractory, low-grade, follicular or transformed non-Hodgkin’s lymphomas, and in patients with rituximab-refractory non-Hodgkin’s lymphomas [144, 149]. The gene discussed is MS4A1; the disease is non-Hodgkin lymphoma.