Articles 
Executive functioning in early treated PKU - Dr. Huijbregts
Executive functioning in early treated PKU - Dr. Huijbregts
Executive functioning in early treated PKU - Dr. Huijbregts
During the ESPKU conference 2009 (Turkey), Dr. S. Huijbregts presented on the topic:
Executive functioning in early treated PKU
You can read the article and the presentation here.
Article: Executive_functioning_in_early_treated_PKU_-_S._Huijbregts.pdf
Presentation: Presentation Stefan Huijbregts