1. Oxford Regional Genetics Laboratories, Churchill Hospital, Oxford University Hospitals NHS Foundation Trust, United Kingdom (J.B.G.H., M.B., K.L.T.)
2. Clinical Genetics Service, Nottingham City Hospital, Nottingham University Hospitals NHS Trust, United Kingdom (N.S.).
3. Oxford Centre for Genomic Medicine, Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, United Kingdom (E.B.).
4. Radcliffe Department of Medicine, Division of Cardiovascular Medicine, University of Oxford, John Radcliffe Hospital, United Kingdom (H.W.).