[AS PER AMENDMENT 7/20/00: The study is closed to accrual except for patients who enroll into A5058s until the protocol can be redesigned. Patients enrolled under Version 1.0 continue to be followed every 12 weeks (plus or minus 14 days) until the end of the study. Patients should continue taking the same potent antiretroviral treatment that they were taking at study entry until reaching the primary endpoint of first virologic relapse.]