Elevated CD38 antigen expression on CD8+ T cells is a stronger marker for the risk of chronic HIV disease progression to AIDS and death in the Multicenter AIDS Cohort Study than CD4+ cell count, soluble immune activation markers, or combinations of HLA-DR and CD38 expression. - Liu Z; Cumberland WG; Hultin LE; Prince HE; Detels R; Giorgi JV (Journal of acquired immune deficiency syndromes and human retrovirology : official publication of the International Retrovirology Association, 1997)