Mildvan D, Bassiakos Y, Zucker ML, Hyslop Jr N, Krown SE, Sacks HS, Zachary J, Paredes J, Fessel WJ, Rhame F, et al. Synergy, activity and tolerability of zidovudine and interferon-alpha in patients with symptomatic HIV-1 infection: AIDS Clincal Trial Group 068. Antiviral therapy. 1996;1:77?88.