Ethical considerations in surveys employing respondent-driven sampling.

@article{Semaan2010EthicalCI,
  title={Ethical considerations in surveys employing respondent-driven sampling.},
  author={Salaam Semaan and Douglas D. Heckathorn and Don C Des Jarlais and Richard S. Garfein},
  journal={American journal of public health},
  year={2010},
  volume={100 4},
  pages={582-3; author reply 583-4}
}