Sipsas, NV Sfikakis, PP Kontos, A Kordossis, T, Levels of soluble CD40 ligand (CD154) in serum are increased in human
immunodeficiency virus type 1-infected patients and correlate with
CD4(+) T-cell counts, Clinical and Diagnostic Laboratory Immunology, (9), 558-561, 2002, AMER SOC MICROBIOLOGY,