info:eu-repo/grantAgreement/FCT/Concurso para Projectos de I&D em todos os Domínios Científicos - 2006/PTDC%2FSAU-FCF%2F67673%2F2006/PTSusceptibility of non-subtype B HIV-1 and HIV-2 isolates to entry inhibitors: identification and characterization of new pathways of resistance.