Serum testosterone assays--accuracy matters.

@article{Matsumoto2004SerumTA,
  title={Serum testosterone assays--accuracy matters.},
  author={Alvin M. Matsumoto and William J. Bremner},
  journal={The Journal of clinical endocrinology and metabolism},
  year={2004},
  volume={89 2},
  pages={520-4}
}