Accuracy assessment of PSA methods must be based on clinical instead of artificial samples--a response to AW Roddam et al., Ann Clin Biochem 2006; 43: 35-48.

@article{Stephan2006AccuracyAO,
  title={Accuracy assessment of PSA methods must be based on clinical instead of artificial samples--a response to AW Roddam et al., Ann Clin Biochem 2006; 43: 35-48.},
  author={Carsten Stephan and Axel Semjonow},
  journal={Annals of clinical biochemistry},
  year={2006},
  volume={43 Pt 5},
  pages={421-2; author reply 422-3}
}