MGUS indicates monoclonal gammopathy of unknown significance; MM, multiple myeloma; SLE, systemic lupus erythematous; WM, Waldenström macroglobulinemia; NHL, non-Hodgkin lymphoma; HCL, hairy cell leukemia; ET, essential thrombocythemia; PV, polycythemia vera; and VWF, von Willebrand factor.