[1] NCI, NIH, Expt Immunol Branch, Bethesda, MD 20892 USA
[2] NCI, NIH, Anim Models & Retrovial Vacc Sect, Bethesda, MD 20892 USA
[3] Med Univ Bialystok, Dept Gen & Expt Pathol, Bialystok, Poland
[4] Innsbruk Med Univ, Div Biol Chem Bioctr, Ludwig Boltzmann Inst AIDS Res, Innsbruck, Austria
[5] Karolinska Univ Hosp, Div Infect Dis, Karolinska Inst, Ctr Infect Med, Stockholm, Sweden
[6] Univ Cincinnati, Coll Med, Dept Pediat, Cincinnati, OH USA
[7] Cincinnati Childrens Hosp Res Fdn, Div Mol Immunol, Cincinnati, OH USA