Sequence variation at the phenylalanine hydroxylase gene in the British Isles.Linda Tyfield, Iain Smith, J. L. Bidwell et al.|PubMed|1997Cited by 22
Discordant phenylketonuria phenotypes in one family: the relationship between genotype and clinical outcome is a function of multiple effects.Linda Tyfield, Leanne Hunt, Johannes Zschocke et al.|Journal of Medical Genetics|1995Cited by 15