[1] Guys & St Thomas Hosp, Dept Neurol, London SE1 9RT, England
[2] St Marys Hosp, Dept Med Genet, Manchester, Lancs, England
[3] Kings Coll Hosp London, Dept Neurosurg, London, England
[4] Birmingham Childrens Hosp, Dept Dermatol, Birmingham, W Midlands, England
[5] Univ Wales Coll Cardiff, Coll Med, Inst Med Genet, Cardiff, Wales
[6] Royal Marsden Hosp, London, England
[7] Guys Hosp London, Dept ENT, London, England
[8] Alder Hey Childrens Hosp, Dept Community Paediat, Liverpool, Merseyside, England
[9] Univ Wales, Dyscovery Ctr, Newport, Gwent, Wales