Prot# A4001026: A Mltcntr, Rndmzd, Dbl-Blind, Comparative Trial Of a Novel CCR5 Antagonist, UK-427,857, in Combination w/Zidovudine/Lamivudine v. Efavirenz in Combination w/Zidovudine/Lamivudine for the Treatment of Antiretroviral-Naïve HIV-1 Infected Sbj