F?tkenheuer G, Nelson M, Lazzarin A, Konourina I, Hoepelman AI, Lampiris H, Hirschel B, Tebas P, Raffi F, Trottier B, Bellos N, Saag M, Cooper DA, Westby M, Tawadrous M, Sullivan JF, Ridgway C, Dunne MW, Felstead S, Mayer H, van der Ryst E. Subgroup analyses of maraviroc in previously treated R5 HIV-1 infection. N Engl J Med. 2008 Oct 02; 359(14):1442-55.