- Receiving a stable cART regimen containing at least three agents (not including ritonavir if less than a 200 mg total daily dose) with no changes in the components of their antiretroviral therapy for at least 90 days prior to study entry. NOTE: One of the agents must include an integrase inhibitor, a non-nucleoside reverse transcriptase inhibitor (NNRTI), or a boosted protease inhibitor (PI).