The study included adult patients with screening or documented history of resistance to RAL and/or EVG and to $2 other antiretroviral classes. Patients had to have plasma viral load $500 copies/mL and had to have at least one active antiretroviral available for the background regimen. Patients treated with efavirenz or nevirapine within 14 days of DTG start were excluded. Patients on etravirine were only included if it was coadministered with LPV/RTV or DRV/RTV. Patients treated with TPV/RTV or FMP/RTV were only allowed to start on day 8 and only if subjects did not have Q148+$2 associated mutations.