Variation in HIV-1 R5 macrophage-tropism correlates with sensitivity to reagents that block envelope: CD4 interactions but not with sensitivity to other entry inhibitors. - Peters, Paul J.; Duenas-Decamp, Maria J.; Sullivan, W. Matthew; Brown, Richard; Ankghuambom, Chiambah; Luzuriaga, Katherine; Robinson, James; Burton, Dennis R.; Bell, Jeanne; Simmonds, Peter; Ball, Jonathan; Clapham, Paul R. (Retrovirology, 2008)