1. Department of Paediatric Dermatology Great Ormond Street Hospital for Children London WC1N 3JH U.K
2. Department of Neurosciences Great Ormond Street Hospital for Children London WC1N 3JH U.K
3. Neurosciences Unit UCL Institute of Child Health London U.K
4. Department of Paediatric Neuroradiology Great Ormond Street Hospital for Children London WC1N 3JH U.K
5. Clinical and Molecular Genetics Unit UCL Institute of Child Health London U.K