1. Department of Pathology & Cell Biology Columbia University Irving Medical Center New York New York USA
2. Univ Brest, Inserm, EFS, UMR1078 France
3. MitoLab, UMR CNRS 6015 ‐ INSERM U1083, MitoVasc Institute, Angers University Hospital Angers France
4. Section of Clinical Genetics and Metabolism, Department of Pediatrics University of Colorado Aurora Colorado USA
5. Department of Pathology and Laboratory Medicine Children's Hospital Colorado Aurora Colorado USA
6. CHRU de Brest, Service de Génétique Médicale et Biologie de la Reproduction, Laboratoire de Génétique Moléculaire et Histocompatibilité France
7. Department of Pediatrics Columbia University Irving Medical Center New York New York USA
8. CHRU de Brest, Service d'anatomie cytologie pathologie, CHU et centre de référence des maladies neuromusculaires Brest France
9. Center for Genomic Medicine Massachusetts General Hospital Boston Massachusetts USA
10. Division of Medical Genetics & Metabolism, Department of Pediatrics Massachusetts General Hospital Boston Massachusetts USA
11. Department of Radiology Columbia University Irving Medical Center New York New York USA
12. Division of Neurogenetics, Child Neurology, Department of Neurology Massachusetts General Hospital Boston Massachusetts USA
13. Department of Biomedical Sciences Columbia University Irving Medical Center New York New York USA
14. Department of Pediatrics Perelman School of Medicine Philadelphia Pennsylvania USA
15. Mitochondrial Medicine Frontier Program, Division of Human Genetics Children's Hospital of Philadelphia Philadelphia Pennsylvania USA
16. CHRU de Brest, Service de Pédiatrie France
17. CHRU de Brest, Service de Radiologie France
18. Division of Medical Genetics Cohen Children's Medical Center New York New York USA
19. Donald and Barbara Zucker School of Medicine at Hofstra/Northwell New York New York USA
20. A complete list of the Undiagnosed Diseases Network members appears in the Supplemental Materials
21. Department of Medicine Columbia University Irving Medical Center New York New York USA