@article{chace_hannon_2016,  title={Technological Journey From Colorimetric to Tandem Mass Spectrometric Measurements in the Diagnostic Investigation for Phenylketonuria},  volume={4},  ISSN={2326-4594},  url={https://doi.org/10.1177/2326409816671733},  DOI={10.1177/2326409816671733},  journal={Journal of Inborn Errors of Metabolism and Screening},  publisher={Latin American Society Inborn Errors and Neonatal Screening (SLEIMPN); Instituto Genética para Todos (IGPT)},  author={Chace, Donald H. and Hannon, William H},  year={2016},  pages={e160017} }