1. Division of Endocrinology, Department of Pediatrics, Nationwide Children’s Hospital/The Ohio State University College of Medicine, Columbus, Ohio, USA
2. Department of Neurology, Washington University School of Medicine in Saint Louis, St. Louis, Missouri, USA
3. Parent Project Muscular Dystrophy, Hackensack, New Jersey, USA
4. Department of Pediatrics, Division of Endocrinology, University of Colorado School of Medicine, Aurora, Colorado, USA