Firestof- behandling omfattende saquinavir bløde kapsler og nelfinavir i tillæg til to nukleosid reverse transkriptasehæmmere gav et mere varigt respons (forlængelse af tiden til viralt tilbagefald) end trestof- behandling med hver enkelt proteasehæmmer.
- Quadruple therapy, including saquinavir soft capsules and nelfinavir in addition to two nucleoside reverse transcriptase inhibitors gave a more durable response (prolongation of time to virological relapse) than triple therapy with either single protease inhibitor.