CD40LG and myeloid sarcoma: A high IgM-EA titer associated with a high IgG-EBNA titer was evident in one healthy control (IgM-EA OD: 0.80; IgG-EBNA OD: 1.25), in one MS patient experiencing an acute relapse (IgM-EA OD: 0.51; IgG-EBNA OD: 1.0) and in one MS patient in remission (IgM-EA OD: 0.50; IgG-EBNA OD: 1.35).