Inexpensive tests of limited value: sometimes you get what you pay for.

@article{Panzer1987InexpensiveTO,
  title={Inexpensive tests of limited value: sometimes you get what you pay for.},
  author={Robert J. Panzer and P F Griner},
  journal={Journal of general internal medicine},
  year={1987},
  volume={2 5},
  pages={365-7}
}