Articles 
Historical Overview on PKU: the five stages.- Prof. H. Levy
Historical Overview on PKU: the five stages.- Prof. H. Levy
Historical Overview on PKU: the five stages.- Prof. H. Levy
During the ESPKU conference 2010 (Denmark), Prof. Harvey Levy presented on the topic:
Historical Overview on PKU: the five stages.
You can read the article and the presentation here.
Article: Levey_Harvey_historical_overview_PKU.pdf
Presentation: Levey_Harvey_historical_overview_PKU.pdf