A new classification for HIV-1

@article{Berger1998ANC,
  title={A new classification for HIV-1},
  author={Edward A Berger and Robert W. Doms and Eva Maria Fenyö and Bt Korber and Dan R. Littman and J. Peter Moore and Quentin J. Sattentau and Hanneke Schuitemaker and Joseph G. Sodroski and Robin A. Weiss},
  journal={Nature},
  year={1998},
  volume={391},
  pages={240-240}
}
The phenotype of HIV-1 isolates is defined by the cells in which they replicate in vitro, but these phenotypes can change in vivo with profound implications for viral transmission, pathogenesis and disease progression. Here we propose a new classification system based on co-receptor use, providing a more accurate description of viral phenotype than the present imprecise and often misleading classification schemes. 
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