@inbook{1154119033, author={Bernd Christian Schwahn}, editor={Kline, Mark W.}, title={Hyperphenylalaninemias and Phenylketonuria}, booktitle={Rudolph's Pediatrics, 23e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2018}, url={accesspediatrics.mhmedical.com/content.aspx?aid=1154119033} }