Hair element content in learning disabled children.

@article{Pihl1977HairEC,
  title={Hair element content in learning disabled children.},
  author={Robert O. Pihl and Mitchell Parkes},
  journal={Science},
  year={1977},
  volume={198 4313},
  pages={204-6}
}
Hair samples from 31 learning disabled and 22 normal children were analyzed for content of 14 elements. Significant group differences were determined and a discriminant function was completed which separated the groups with 98 per cent accuracy. Elevated lead and cadmium content in the learning disabled group is viewed as being of particular importance.