Williams M M, Tyfield L A, Jardine P, Lunt P W, Stevens D L, Turnpenny P D
Department of Clinical Chemistry, Southmead Hospital, Bristol BS10 5NB, United KingdomPaediatric Neurology, Frenchay Hospital, Bristol BS16 1LE, United KingdomClinical Genetics, Bristol Children's Hospital, Bristol BS2 8BJ, United KingdomNeurology, Gloucester Royal Hospital, Gloucester GL1 3NN, United KingdomClinical Genetics, Royal Devon and Exeter Hospital, Exeter EX2 5DW, United Kingdom.
Ann N Y Acad Sci. 1999 Oct;883(1):500-503. doi: 10.1111/j.1749-6632.1999.tb08621.x.