1. Reta Lila Weston Institute of Neurological Studies; UCL Institute of Neurology; London; UK
2. Department of Molecular Neuroscience; UCL Institute of Neurology; London; UK
3. ICH-Neurosciences Unit; UCL Institute of Child Health; London; UK
4. Department of Neurology; Birmingham Children's Hospital; Birmingham; UK
5. Royal Blackburn Hospital; Blackburn; UK
6. Addenbrooke's NHS Trust; Cambridge; UK
7. Department of Paediatric Neurology; Bristol Royal Hospital for Children; Bristol; UK
8. Department of Paediatrics; Peterborough City Hospital; Peterborough; UK
9. Department of Paediatric Neurology; Manchester Children's Hospital; Manchester; UK
10. Child Neurology Unit; Department of Neurology; University of Campinas, UNICAMP; Campinas; Brazil
11. MRC Centre for Neuromuscular Diseases; UCL Institute of Neurology; London; UK
12. Neurosciences Unit; UCL Institute of Child Health; London; UK