A Post Marketing Surveillance Study Assessing the Long-term Efficacy and Safety of Aptivus Co-administered With Low-dose Ritonavir in Treatment Experienced Patients With HIV-1 Infection in the Daily Clinical Practice.

Virologic Response

Virologic response is defined as HIV viral load of \< 50 copies/mL before week 48 and without subsequent rebound or change of ARV therapy prior to week 48. A rebound is defined by two consecutive measurements of VL \>= 50 copies/ml, at least two weeks apart, after two consecutive measurements of VL\< 50 copies/ml. Because of many missing data concerning the viral load, the virologic response could be determined only for four patients.

Time frame: 48 weeks

Change in CD4+ Cell Count From Baseline at Week 48

Time frame: 48 weeks