Chronic fatigue syndrome: xenotropic murine leukemia virus-related virus, murine leukemia virus, both, or neither?

@article{Erlwein2010ChronicFS,
  title={Chronic fatigue syndrome: xenotropic murine leukemia virus-related virus, murine leukemia virus, both, or neither?},
  author={Otto Erlwein and Steve Kaye and Mark J. Robinson and Myra O. McClure},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2010},
  volume={107 43},
  pages={E161; author reply E163-4}
}