A Multicenter, Double-Blind, Phase III, Adjuvant-Controlled Study of the Effect of 10 Units of HIV-1 Immunogen (Remune) Compared to Incomplete Freund's Adjuvant (IFA) Alone Every 12 Weeks on AIDS-Free Survival in Subjects With HIV Infection and CD4 T-Lymphocytes Between 300 and 549 Cells/microL Rega