1. Department of Pediatrics (O.V.F.-G., V.H., R.G.R.), Oregon Health & Science University, Portland, Oregon 97239-3098;
2. Department of Pediatrics (J.M.W., H.A.v.D.), Leiden University Medical Center, 2300 Leiden, The Netherlands;
3. Division of Endocrinology (H.M.D., H.G.J.), Ricardo Gutierrez Children’s Hospital, Endocrinology Research Center, 1425 Buenos Aires, Argentina;
4. Department of Pediatrics (J.A., J.P.), Hospital Infantil Universitario Niño Jesús, Centro de Investigación Biomédica en Red (CIBER) de fisiopatología de la obesidad y nutrición (CIBERobn), Instituto de Salud Carlos III, E-28009 Madrid, Spain;
5. Universidad Autonóma de Madrid, and Department of Pediatric Endocrinology (J.A., J.P.), Hospital Infantil Universitario Niño Jesús, Centro de Investigación Biomédica en Red (CIBER) de fisiopatología de la obesidad y nutrición (CIBERobn), Instituto de Salud Carlos III, E-28009 Madrid, Spain;
6. Pediatric Endocrinology Unit (P.B.), Karolinska Institute and University Hospital, 17176 Stockholm, Sweden;
7. Birmingham Children’s Hospital (W.H.), Birmingham B4 6NH, United Kingdom;
8. Hospital for Sick Children (S.K.), Toronto, Ontario, Canada M5G 1X8;
9. Children’s Hospital and Regional Medical Center (C.P., H.K.C.), Seattle, Washington 98105;
10. Division of Endocrinology (L.C., C.J.), Children’s Hospital Boston, Boston, Massachusetts 02115;
11. Medical University of Vienna (G.H.), 1090 Vienna, Austria;
12. Institute of Medical and Molecular Genetics (A.C.-B.), IdiPAZ, Hospital University La Paz and CIBER de Enfermedades Raras, Instituto de Salud Carlos III, 28046 Madrid, Spain;
13. Pediatric Endocrinology (E.G.-G.), Hospital University 12 de Octubre, 28006 Madrid, Spain;
14. and Pediatric Endocrinology, Hospital University La Paz (R.G.-B.), 28046 Madrid, Spain