Biomarker Classes in MF/SzS—Putative markers include[1] molecules measured in serum samples,[2] leucocyte cell population changes measured by whole blood or peripheral mononuclear cell analysis,[3] cell surface markers measured by flow cytometry or immunohistochemistry and[4] genetic and epigenetic markers measured by a variety of molecular techniques. Biomarkers may belong to several categories at the same time. LDH, lactate dehydrogenase; β2M, beta-2 microglobulin; WBC, white blood cell count; ALC, absolute lymphocyte count