1. East Anglian Medical Genetics ServiceCambridge University Hospitals NHS Foundation Trust Hills Road, Cambridge CB2 0QQ UK
2. Departments of Neurology & Pediatric Neurology, Donders Institute for Brain, Cognition and BehaviourRadboud University Medical Centre Nijmegen The Netherlands
3. Ataxia Telangiectasia Service, Respiratory Support and Sleep Centre, Papworth Hospital. Papworth Everard Cambridge CB23 3RE UK
4. Department of RadiologyCambridge University Hospitals NHS Foundation Trust, Hills Road Cambridge CB2 0QQ UK
5. Department of NeurophysiologyCambridge University Hospitals NHS Foundation Trust, Hills Road Cambridge CB2 0QQ UK
6. Nottingham Clinical Genetics Service, National Paediatric Ataxia‐Telangiectasia Clinic Nottingham UK
7. School of MedicineUniversity of Nottingham, Queen's Medical Centre Nottingham NG7 2UH UK
8. Department of Paediatric Neurology, Nottingham Children's HospitalNottingham University Hospitals NHS Trust NG7 2UH UK
9. Department of Medical Genetics, Cambridge Biomedical Campus Cambridge CB2 0QQ UK
10. The Alan Turing Institute, British Library, 96 Euston Road London NW1 DB UK
11. MRC Biostatistics UnitUniversity of Cambridge, Robinson Way, Cambridge Biomedical Campus Cambridge CB2 0QQ UK
12. Institute of Cancer and Genomic SciencesCollege of Medical and Dental Sciences, University of Birmingham, Edgbaston Birmingham, B15 2TT UK
13. Department of PediatricsRadboudumc Amalia Children's Hospital Nijmegen The Netherlands
14. Department of NeurologyCambridge University Hospitals NHS Foundation Trust, Hills Road Cambridge CB2 0QQ UK