We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePhenylalanine and tyrosine levels in newborn screening blood samples.AuthorsMorris, A F; Holton, J B; Burman, D; Colley, J RPublicationArchives of Disease in Childhood, 1983, Vol 58, Issue 4, p271ISSN0003-9888Publication typearticleDOI10.1136/adc.58.4.271