<qa>  What is the first time patients will discontinue ART?Upon study entry, patients will discontinue ART. During the first 6 weeks of the study, viral load will be monitored weekly and CD4 T-cell counts will be monitored every other week. Viral load and CD4 T-cell counts will be measured every other week from Week 6 through Week 24, then monthly until patients restart ART or until Week 48. Patients who reinitiate ART for any reason will be registered to Step 2 and followed for 10 weeks. 