The changing landscape of crack cocaine use and HIV infection.

@article{Celentano2009TheCL,
  title={The changing landscape of crack cocaine use and HIV infection.},
  author={David D Celentano and Susan G. Sherman},
  journal={CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne},
  year={2009},
  volume={181 9},
  pages={571-2}
}