Author information:
(1)Center of Medical Genetics, University of Antwerp and Antwerp University 
Hospital, Edegem 2650, Belgium.
(2)Center of Medical Genetics, University of Antwerp and Antwerp University 
Hospital, Edegem 2650, Belgium; Department of Human Genetics, Radboud University 
Nijmegen Medical Center, Nijmegen 6525 GA, the Netherlands.
(3)Laboratory of Physiopharmacology, University of Antwerp, Antwerp 2610, 
Belgium.
(4)Center of Medical Genetics, University of Antwerp and Antwerp University 
Hospital, Edegem 2650, Belgium; StatUa Center for Statistics, University of 
Antwerp, Antwerp 2000, Belgium.
(5)Center of Medical Genetics, University of Antwerp and Antwerp University 
Hospital, Edegem 2650, Belgium; Laboratory of Molecular, Cellular and Network 
Excitability, Department of Biomedical Sciences, University of Antwerp, Antwerp 
2610, Belgium.
(6)Laboratory of Cell Biology & Histology, Department of Veterinary Sciences, 
University of Antwerp, Antwerp 2610, Belgium.
(7)Prince Sultan Cardiac Centre, Qassim 31982, Saudi Arabia.
(8)NIHR Oxford Biomedical Research Centre, Wellcome Centre for Human Genetics, 
University of Oxford, Oxford OX3 7BN, UK.
(9)Bristol Genetics Laboratory, South West Genomic Laboratory Hub, Southmead 
Hospital, Bristol BS10 5NB, UK.
(10)Department of Molecular and Human Genetics, Baylor College of Medicine, 
Houston, TX 77030, USA; Baylor Genetics Laboratories, Houston, TX 77021, USA.
(11)Department of Pediatric Cardiology, Cliniques Universitaires Saint-Luc, 
University of Louvain, Brussels 1200, Belgium.
(12)Birmingham Women's and Children's Hospital NHS Foundation Trust, Steelhouse 
Lane, Birmingham B4 6NH, UK.
(13)Birmingham Women & Children's Hospital, Birmingham B4 6NH, UK.
(14)Musgrove Park Hospital, Somerset NHS Foundation Trust, Taunton TA1 5DA, UK.
(15)Department of Paediatric Neurology, University Hospitals Bristol NHS 
Foundation Trust, Bristol BS2 8BJ, UK.
(16)Pediatric Department, Faculty of Medicine, Mashhad University of Medical 
Sciences, Mashhad 009851, Iran.
(17)Department of Pediatric Neurology, School of Medicine, Mashhad University of 
Medical Sciences, Mashhad 009851, Iran.
(18)Department of Molecular Genetics, Next Generation Genetic Polyclinic, 
Mashhad University of Medical Sciences, Mashhad 009851, Iran.
(19)Department of Pediatric Neurology, Ghaem Hospital, Mashhad University of 
Medical Sciences, Mashhad 009851, Iran.
(20)Cardiovascular Genetic Program, Department of Medical Genetics, King Faisal 
Specialist Hospital and Research Centre, Riyadh 11564, Saudi Arabia.
(21)West Midlands Regional Genetics Service, Birmingham Women's and Children's 
Hospital, Birmingham, B15 2TG, UK.
(22)Center for Human Genetics, Cliniques Universitaires Saint-Luc, University of 
Louvain, Brussels 1200, Belgium.
(23)Centre de Génétique Humaine, Institut de Pathologie et de Génétique, 
Gosselies (Charleroi) 6041, Belgium.
(24)The Heart Institute, Department of Pediatrics, Cincinnati Children's 
Hospital Medical Center and University of Cincinnati College of Medicine, 
Cincinnati, OH 45229, USA.
(25)Division of Human Genetics, Department of Pediatrics, Cincinnati Children's 
Hospital Medical Center and University of Cincinnati College of Medicine, 
Cincinnati, OH 45229, USA.
(26)GeneDx, Gaithersburg, MD 20877, USA.
(27)Department of Neuromuscular Disorders, UCL Queen Square Institute of 
Neurology, London, WC1N 3BG, UK.
(28)Center of Medical Genetics, University of Antwerp and Antwerp University 
Hospital, Edegem 2650, Belgium; Department of Human Genetics, Radboud University 
Nijmegen Medical Center, Nijmegen 6525 GA, the Netherlands. Electronic address: 
bart.loeys@uantwerpen.be.
(29)Center of Medical Genetics, University of Antwerp and Antwerp University 
Hospital, Edegem 2650, Belgium. Electronic address: 
aline.verstraeten@uantwerpen.be.