1. West Midlands Regional Genetics ServiceBirmingham Women's and Children's Hospital Birmingham UK
2. Centre for Rare Diseases and Personalised MedicineUniversity of Birmingham Birmingham UK
3. Neuromuscular Service, Robert Jones and Agnes Hunt Orthopaedic Hospital Oswestry UK
4. North East Thames Regional Genetics ServiceGreat Ormond Street Hospital for Children NHS Foundation Trust London UK
5. Department of Medical GeneticsUniversity of Cambridge and NIHR Cambridge Biomedical Research Centre Cambridge UK