Amprenavir/Ritonavir or Saquinavir/Ritonavir in HIV-Infected Subjects Following Failure With Kaletra as Their Second Protease Inhibitor [clinicaltrials:NCT00038519]

Amprenavir/Ritonavir or Saquinavir/Ritonavir in HIV-Infected Subjects Following Failure With Kaletra as Their Second Protease Inhibitor [clinicaltrials:NCT00038519]